9 Best Battery Operated Weather Stations for Home (November 2026)
The best battery operated weather stations for home include the Newentor Weather Station Wireless Indoor Outdoor Thermometer for quick battery powered checks, the Ambient Weather WS-2902 Wi-Fi Smart Weather Station for solar sensor power with backup, and the La Crosse Technology Weather Station with Customizable for battery backup at the console.
On this page (6 sections)
- Which battery operated weather station fits your home?
- What does battery operated mean for a weather station?
- How can you compare battery life and screen behavior?
- Which weather readings should you prioritize?
- How should you place a battery powered weather station?
- How do you choose among these battery operated weather stations?
The Newentor Weather Station Wireless Indoor Outdoor Thermometer is the best battery operated weather station for most homes if you want a display for quick checks. On battery power, its screen lights for 15 seconds before dimming.
That brief light suits a quick glance on waking or when comparing indoor comfort with the outdoor sensor.
Battery operated can mean different things. Some models power the display from batteries, some use batteries only as backup, and some reserve them for the outdoor sensor.
Decide first whether you need the screen lit all day or only when you check it, since that choice affects placement and battery changes.
Then compare console and sensor power needs, along with the readings you want. Indoor temperature and humidity suit comfort checks, while outdoor readings, barometric pressure and forecast help you plan the day.
The Newentor fits a desk, shelf, bedside table or wall away from an outlet. Its included DC adapter gives another option for an always-on display in a fixed spot.
One remote sensor is included, and the station supports up to three.
The screen shows indoor and outdoor temperature and humidity, daily high and low records, customizable alerts, time and date, forecast, moon phase and barometric pressure. Place the console where you will look at it, and mount the sensor where it can measure outdoor air without direct sun on the housing.
Batteries are not included, so have suitable cells ready before setup.
Our picks at a glance
-
1
Best for quick battery powered checksNewentor Weather Station Wireless Indoor Outdoor Thermometer
9.7/10 our score
See it on Amazon -
2
Best for solar sensor power with backupAmbient Weather WS-2902 Wi-Fi Smart Weather Station
9.6/10 our score
See it on Amazon -
3
Best for battery backup at the consoleLa Crosse Technology Weather Station with Customizable
9.5/10 our score
See it on Amazon
- 4
Check itLa Crosse Technology Advanced Weather Station
Best for a battery powered console - 5
Check itLICHI Indoor Outdoor Thermometer Wireless Weather Station
Best for a battery powered thermometer - 6
Check itAcuRite Home Weather Station with Vertical Full-Color
Best for a tall color display - 7
Check itSainlogic 12-in-1 Wireless Weather Station with Rain
Best for broad readings with battery backup - 8
Check itAcuRite Wireless Home Weather Station with Color
Best for an outlet display with backup - 9
Check itDreamSky Weather Station Indoor Outdoor Thermometer Wireless
Best for a battery powered weather clock
Which battery operated weather station fits your home?
The best fit depends on which unit needs power and how often you want to read its display. For more display and measurement options, see digital weather stations for home.
These nine picks are ordered by score, with battery behavior called out so you can compare the tradeoffs.
Newentor Weather Station Wireless Indoor Outdoor Thermometer: Best for quick battery powered checks
- Battery-only display enters eco mode
- 15-second screen light
- Indoor and outdoor temperature and humidity
- Supports up to 3 remote sensors
Battery operation dims the screen after a 15-second glance, while the included adapter supports an always-on display. The station includes one remote sensor and can support up to three.
Pros
- Battery-only quick-glance mode
- Supports up to 3 sensors
- Shows temperature, humidity and barometric pressure
Cons
- Batteries are not included
- Always-on display requires the adapter
The Newentor Weather Station Wireless Indoor Outdoor Thermometer is a strong fit for a bedroom, living room or desk where you want a battery powered display without a bright screen running all day. On batteries alone, the display enters eco mode and lights for a quick 15-second glance before dimming.
You can use the included DC adapter for a vibrant always-on screen. One remote sensor is included, and the station supports up to three sensors for monitoring other rooms or locations.
The screen shows indoor and outdoor temperature and humidity, daily highs and lows, customizable alerts, time and date, forecast, moon phase and barometric pressure. That mix makes it more than a basic thermometer, though the display's battery mode is designed for brief checks.
Choose this model if you want the option to move the console away from an outlet and don't mind tapping to wake the screen. For battery choices and replacement guidance, see what batteries to use in an AcuRite weather station, which explains why model-specific battery needs matter.
Ambient Weather WS-2902 Wi-Fi Smart Weather Station: Best for solar sensor power with backup
- Solar powered sensor array
- Optional battery backup for array
- Wi-Fi console connectivity
- Measures wind, rain, UV and solar radiation
The sensor array uses solar power with optional battery backup, so this is a fit for outdoor monitoring without a sensor power outlet. The console connects to Wi-Fi and includes a color display.
Pros
- Solar-powered sensor array
- Optional battery backup
- Broad outdoor weather readings
Cons
- Console includes an AC adapter
- Batteries for backup are not included
The Ambient Weather WS-2902 suits a yard where you want more weather readings and don't want to run power to the outdoor sensor array. Its array uses a solar panel with optional battery backup, while the indoor console has an AC adapter.
The sensor array measures wind speed and direction, temperature, humidity, rainfall, UV intensity and solar radiation. The color console connects to the array wirelessly, then uses Wi-Fi for remote access and alerts.
This is a different kind of battery powered setup from a console designed to run on AA or AAA cells. It makes sense when the outdoor sensor's power source is the main concern, and when you can place the array where it receives useful sunlight.
Pick it for broader backyard monitoring and Wi-Fi access. If the solar part is your priority, compare it with these best solar powered WiFi weather stations before choosing a system.
La Crosse Technology Weather Station with Customizable: Best for battery backup at the console
- 5V adapter for constant backlight
- Optional backup uses 3 AA batteries
- Battery-only backlight is on demand
- Outdoor sensor requires 2 AA batteries
This La Crosse station can use AA batteries as console backup, and the display shifts to on-demand backlighting in battery-only operation. Its wireless outdoor sensor also uses batteries.
Pros
- Console has battery backup option
- On-demand backlight can save power
- Custom temperature and humidity alerts
Cons
- Adapter is needed for constant backlight
- Outdoor sensor batteries are separate
The La Crosse C85845-INT suits a home that normally uses an outlet but wants battery backup for the console. Its 5V adapter supports a constant backlight, while optional 3 AA batteries provide backup and battery-only operation uses an on-demand light.
That gives you a clear main power source and a fallback for interruptions. You can keep the screen easy to read in normal use, then rely on batteries when the outlet is unavailable for a short time.
The wireless outdoor sensor needs 2 AA batteries of its own. It reports outdoor temperature and humidity, while the console also shows indoor readings, dew point, heat index, comfort charts, forecast icons and customizable alerts.
Those extra views help you judge comfort indoors and conditions outside. Dew point and heat index are especially useful on warm days, when temperature alone does not tell the full story.
This is not a fully battery powered, always-lit console. The power saving behavior limits the backlight on batteries, so you need to wake the screen to check it.
Choose it if a constant screen is useful near an outlet and backup matters during a power interruption. Keep the sensor batteries in mind as a separate part of the setup.
La Crosse Technology Advanced Weather Station: Best for a battery powered console
- Battery powered console option
- Battery-only light is on demand
- Optional 5V power adapter
- Outdoor sensor has 330 ft range with no obstructions
The station offers a battery powered console and a temporary on-demand backlight. Its wireless outdoor sensor sends temperature and humidity readings to the indoor display.
Pros
- Battery powered console option
- On-demand lighting helps conserve power
- Shows temperature and humidity
Cons
- Batteries are not included
- Backlight is temporary on battery power
The La Crosse Advanced Weather Station works for buyers who want a battery powered console with a screen that lights on demand. The display can also use an optional 5V adapter, and the station requires 3 AAA alkaline batteries.
That flexibility lets you choose between portable placement and a brighter, steadier display near an outlet. Battery power suits a shelf or table where a cord would be awkward, while the adapter suits a fixed weather center.
Its wireless outdoor sensor sends temperature and humidity readings, and the console records minimum and maximum values. It also offers forecast icons, alerts, atomic time, heat index and dew point.
Recording daily highs and lows helps you spot patterns over a week. You can see whether nights are cooling enough, whether indoor humidity is creeping up, or whether a warm spell is building outside.
The console has a battery power option and an on-demand backlight. The outdoor sensor's power requirements are not specified, so check the details for the exact sensor before you plan replacement cells.
In practice, on-demand lighting helps conserve battery power, but it means the screen will not stay lit for a quick look from across the room. You will need to wake it when you want to read the display.
Choose this station if portability and basic indoor/outdoor conditions matter more than a continuously lit display. It fits a room where you check the weather in passing and do not mind pressing a button to see the numbers.
LICHI Indoor Outdoor Thermometer Wireless Weather Station: Best for a battery powered thermometer
- Indoor display uses 3 AAA batteries
- Remote sensor uses 2 AA batteries
- Backlight lights for 10 seconds
- Supports up to 3 sensors
Both the indoor display and remote sensor use batteries, making this a straightforward choice when you don't want a console outlet. Its backlight turns on for 10 seconds when pressed.
Pros
- Battery powered display and sensor
- 10-second backlight
- Supports up to 3 sensors
Cons
- Batteries are not included
- Does not have an always-on display mode
The LICHI Indoor Outdoor Thermometer Wireless Weather Station is a straightforward choice when both the indoor display and outdoor sensor should run on replaceable batteries. The indoor unit uses 3 AAA batteries and the sensor uses 2 AA batteries, which are not included.
That battery power at both ends gives you freedom to place the console without hunting for an outlet. A bedside table, kitchen wall or entryway shelf can work, as long as the sensor can send readings back reliably.
Its LCD shows temperature and humidity, and a built-in pressure sensor supports a 12 to 24 hour forecast. The backlight turns on for 10 seconds when pressed, and the station can support up to three sensors with one included.
The short backlight is designed for quick checks rather than continuous viewing. It can be comfortable in a dim room, since the light turns off again instead of staying bright while you sleep.
This model focuses on indoor and outdoor conditions rather than a large array of weather measures. You will need to keep two battery sizes on hand, and check both units when you change batteries so one does not run low unnoticed.
Pick it when you want a display that does not depend on an outlet. Consider the short backlight period if you plan to read it in a dim room, and make sure the sensor position gives you the outdoor readings you actually want.
AcuRite Home Weather Station with Vertical Full-Color: Best for a tall color display
- 8.75 in tall display
- Power adapter included
- Wireless outdoor temperature and humidity sensor
- Indoor and outdoor readings
The vertical color display shows indoor and outdoor readings, date, time and barometric pressure. It includes a power adapter.
Pros
- Tall vertical color display
- Includes an outdoor sensor
- Shows indoor and outdoor temperature and humidity
Cons
- Requires an outlet for power
- Battery-only display behavior is not specified
The AcuRite Home Weather Station with Vertical Full-Color suits a wall or table setup where a tall, vertical color display is easy to read. It includes a power adapter and a wireless outdoor sensor that measures temperature and humidity.
The tall shape works well in a kitchen, hallway or home office where wall space is narrow. You can set it on a surface with the kickstand or hang it using the back keyhole, depending on the room.
The 8.75 in display shows indoor and outdoor readings, daily highs and lows, date, time and barometric pressure. AcuRite describes a 12-hour personalized forecast based on current conditions.
Seeing indoor and outdoor values side by side makes it easier to decide whether to open a window, adjust heating, or dress for a trip outside. Trend arrows and daily records also help you notice changes through the day.
This is an option for shoppers who want an AcuRite display with multiple placement choices. The station includes a power adapter, and its battery-only display behavior is not specified.
That missing detail matters if battery operation is central to your plan. If you need a console that runs mainly on batteries, confirm how the screen behaves without the adapter before you place the station.
Choose this model for the vertical color screen and home weather readings. If you've already settled on AcuRite, the best battery for an outdoor weather station guide can help you think through sensor battery needs.
Sainlogic 12-in-1 Wireless Weather Station with Rain: Best for broad readings with battery backup
- Solar powered with battery backup
- Tracks wind, rainfall and barometric pressure
- Large 6.5 in display
- Custom alerts
Solar power with battery backup supports its broad outdoor monitoring features. The display covers wind, rainfall, temperature, humidity and pressure.
Pros
- Solar and battery backup power
- Tracks wind and rainfall
- Three backlight levels
Cons
- Backup battery is not included
- Display adapter is included
The Sainlogic 12-in-1 Wireless Weather Station with Rain fits a buyer who wants broader outdoor measurements and solar power with battery backup. Its display covers wind speed and direction, rainfall, temperature, humidity and barometric pressure, with a 6.5 in screen.
The large screen and bold numbers make it easier to read from a short distance. That can help in a kitchen, living room or home office where you want to check several readings without standing close to the console.
The console has three backlight levels, and the station supports custom alerts. Its wireless transmission avoids a cable between the outdoor sensor and display.
Adjustable backlighting lets you match the screen to daylight or evening use. Custom alerts can also be helpful if you want a warning for conditions you care about, rather than checking the display on a fixed schedule.
The station has solar power with battery backup. The display console comes with a power adapter.
That split is important to keep in mind during setup. Solar power supports the outdoor sensor, while the console still has its own adapter, so plan for an outlet where the display will sit.
Check how to find a compatible AcuRite power adapter if you need a replacement.
Choose Sainlogic when rainfall and wind readings matter as much as temperature. It offers more weather measurements than a simple indoor/outdoor thermometer, so it suits a garden, yard or broader home weather setup.
AcuRite Wireless Home Weather Station with Color: Best for an outlet display with backup
- Indoor display uses an AC adapter
- Optional 3 AA display backup
- Outdoor sensor uses 2 AA batteries
- Color LCD with adjustable dimmer
This AcuRite pairs an outlet powered display with optional AA battery backup. The remote sensor also uses AA batteries and sends outdoor readings wirelessly.
Pros
- Optional console battery backup
- Outdoor sensor uses replaceable batteries
- Color display with dimmer
Cons
- Main display is outlet powered
- Batteries are not included
The AcuRite Wireless Home Weather Station with Color is best treated as an outlet-powered display with optional battery backup. Its indoor color screen uses an AC adapter and can take 3 AA batteries for backup, while the outdoor sensor uses 2 AA batteries.
That design works well for a fixed weather center near a wall outlet. The adapter keeps the color display powered for normal use, while the AA backup gives you some cover if power is interrupted.
The station shows indoor and outdoor temperature, humidity and barometric pressure trends, plus forecast icons, moon phase and high/low records. The display has an adjustable dimmer.
The dimmer is a helpful detail for bedrooms or living rooms used in the evening. You can lower the brightness to keep the screen readable without making it the brightest thing in the room.
This setup can be useful if you want battery backup without expecting the console to run as a portable display. Its outdoor sensor has an integrated hanger for mounting on a post or tree branch.
Mounting the sensor securely matters more than the exact hanger style. Choose a spot with good airflow, some protection from direct sun, and easy access when the AA batteries need replacing.
Pick it if an outlet is available for the screen and you want backup power on hand. For a display designed to run on batteries, compare the LICHI or DreamSky options.
DreamSky Weather Station Indoor Outdoor Thermometer Wireless: Best for a battery powered weather clock
- Battery powered station and sensor
- 3 AAA batteries for console
- 2 AA batteries for sensor
- Atomic clock and outdoor alerts
The DreamSky console and outdoor sensor both run on batteries, and the display combines weather readings with an atomic clock. One outdoor sensor is included.
Pros
- Battery powered console and sensor
- Atomic clock with date
- High and low outdoor alerts
Cons
- Batteries are not included
- Only one outdoor sensor is included
The DreamSky Weather Station Indoor Outdoor Thermometer Wireless fits a battery powered weather clock with indoor and outdoor readings. It uses 3 AAA batteries in the console and 2 AA batteries in the outdoor sensor, and one sensor is included.
Running both units on batteries makes placement flexible in rooms without a convenient outlet. The console can sit where you check the time and weather each morning, while the sensor sits outside within transmission range.
Its LCD shows temperature, humidity and barometric pressure trends, along with an atomic clock and date. The station also records daily maximum and minimum readings and offers high and low outdoor temperature alerts.
The atomic clock is practical for a bedside or entryway table. It keeps time and date updated, and the weather readings sit alongside it instead of needing a separate clock.
The display has three channel options, so additional sensors may be useful for other places. Start with the included sensor, then decide whether another location is worth the added setup.
Choose DreamSky if the clock and battery-powered sensor pair suit a room without a convenient outlet. It offers fewer measures than solar array systems, but covers the core indoor and outdoor conditions many homes check first.
| Product | Best for | Display power | Sensors | Readings | Our score |
|---|---|---|---|---|---|
| Newentor Weather Station Wireless Indoor Outdoor Thermometer | quick battery powered checks | Batteries for quick-glance eco mode; adapter for always-on display | 1 included; supports up to 3 | Temperature, humidity, forecast, barometric pressure | 9.7 |
| Ambient Weather WS-2902 Wi-Fi Smart Weather Station | solar sensor power with backup | Wind, temperature, humidity, rainfall, UV and solar radiation | 9.6 | ||
| La Crosse Technology Weather Station with Customizable | battery backup at the console | Temperature, humidity, dew point and heat index | 9.5 | ||
| La Crosse Technology Advanced Weather Station | a battery powered console | Temperature, humidity, forecast and alerts | 9.3 | ||
| LICHI Indoor Outdoor Thermometer Wireless Weather Station | a battery powered thermometer | Temperature, humidity and forecast | 9.2 | ||
| AcuRite Home Weather Station with Vertical Full-Color | a tall color display | Temperature, humidity and barometric pressure | 8.9 | ||
| Sainlogic 12-in-1 Wireless Weather Station with Rain | broad readings with battery backup | Temperature, humidity, wind, rain and pressure | 8.8 | ||
| AcuRite Wireless Home Weather Station with Color | an outlet display with backup | Temperature, humidity and barometric pressure trends | 8.7 | ||
| DreamSky Weather Station Indoor Outdoor Thermometer Wireless | a battery powered weather clock | Temperature, humidity, pressure and forecast | 8.3 |
What does battery operated mean for a weather station?
A battery operated weather station may use batteries for the display, the outdoor sensor or both. Check each unit separately because wireless communication only describes how readings travel between them.
Wireless means the outdoor sensor sends data to the indoor console without a cable. It does not tell you whether the screen is rechargeable, whether the console can run on batteries, or how long the display stays lit.
Screen behavior matters. A console may run on batteries but turn off its backlight between checks, or use an adapter for full-time lighting with batteries reserved for backup.
That difference shapes daily use more than the word wireless does.
A short on-demand light suits quick checks, while a constant backlight is better for reading from across a room. The outdoor sensor has its own power needs and may take AA or AAA batteries, or use solar power with battery backup.
Solar power changes upkeep, since the panel does the main work and a battery may only provide backup. Battery-powered sensors need fresh cells on a regular schedule.
Before you buy, list the power source for each unit and whether batteries are the main source or only backup. Also check whether batteries are included, since many stations do not include the cells.
Placement should follow those details. An adapter-powered console needs a reachable outlet, while a battery console needs a spot where you can press a button to wake the screen.
The sensor needs a stable mount, good airflow, and access for cleaning or battery changes.
For a plain overview of the options, read How Do Weather Stations Get Power? The Simple Answer.
How can you compare battery life and screen behavior?
Battery life depends on how a station uses its screen and sensors, so compare stated power modes rather than assuming all battery powered models behave alike. A screen that lights only when pressed uses batteries differently from a display designed to remain on.
Always-on displays draw power steadily, so they usually rely on an adapter unless the maker states otherwise. On-demand lighting trades constant visibility for lower use between checks, which can suit a bedside table.
The Newentor is a clear example: on battery power, it lights for 15 seconds and then dims. La Crosse C85845-INT also shifts to on-demand lighting when battery powered, while its adapter supports a constant backlight.
Those examples show why you should read the power details for the exact model. Two stations can both claim battery operation, yet one may dim after a short glance and the other may need an outlet for a bright screen.
If you need the display continuously visible, plan for an adapter or verify that battery mode supports that use. For a room where you check readings now and then, a brief backlight may be enough.
Sensor use also matters, since outdoor units transmit readings on a regular schedule. A sensor that runs on AA or AAA cells will need replacements, while a solar sensor may use a battery only as backup.
Battery type and count affect upkeep, too. Before buying, list the cells needed for the console and sensor, then decide whether keeping both sizes on hand is acceptable.
Which weather readings should you prioritize?
Choose readings based on how you'll use the station, since extra sensors and data features can add setup needs. A simple temperature and humidity display may suit indoor comfort checks, while a garden setup may benefit from wind and rainfall measures.
The Newentor, La Crosse and AcuRite home models focus on indoor/outdoor temperature and humidity, with other features such as forecast, alerts or barometric pressure depending on the model. Ambient Weather and Sainlogic add measures like wind and rain, while Ambient Weather also includes UV and solar radiation.
Remote sensors can help cover multiple locations. Newentor, LICHI and DreamSky support additional sensors, but check how many are included and whether you need to buy more separately.
For a closer look at typical sensor sets, see What Sensors Come with a Home Weather Station? What to Expect.
If your goal is to use readings as a forecast, Can a Home Weather Station Predict Weather? A Plain Guide explains what a personal station can tell you.
How should you place a battery powered weather station?
Place the indoor console where you can read it and where its power method fits, then mount the outdoor sensor where it can send readings back reliably. A wireless connection removes the cable between units, but walls and the sensor's location still matter.
For a battery-only console, choose a spot where you can reach the buttons to wake the display. For an adapter-powered console, make sure the outlet cord can reach without putting the screen in an awkward location.
Outdoor sensors need a stable mounting point and access for battery changes or cleaning. Before mounting, check the unit's instructions and range details, then choose a spot that suits its measurements and avoids unnecessary barriers.
If you're mounting a sensor on a pole, the best AcuRite weather station mounting pole guide can help with the hardware decision. For longer-term records, compare the best weather station with data logging options.
How do you choose among these battery operated weather stations?
Pick the Newentor if you want a display that can operate on batteries for quick checks, and choose LICHI or DreamSky if you want both console and sensor battery power. Consider Ambient Weather or Sainlogic when solar outdoor power and broader measures matter more.
Those choices cover the main power patterns in this guide. A quick-glance console suits flexible placement, battery power at both ends suits rooms without outlets, and solar outdoor systems suit yards where wind, rain or other readings matter.
The La Crosse C85845-INT and AcuRite 02077M are outlet-powered consoles with battery backup options. Read each model's power requirements before buying, including the outdoor sensor, so you know whether batteries are the main source or backup.
Backup power should not be confused with portable operation. If the adapter is the main source, keep the console near an outlet and treat batteries as cover for interruptions.
For most households, start with the screen behavior and sensor power method. Those two details decide where the station can sit and how often you change batteries.
Then choose the readings and sensor count that match your placement. Indoor comfort checks may need only temperature and humidity, while a garden setup may benefit from wind and rainfall.
Check how many sensors are included before you order. Some stations include one sensor and support more, so another location may mean buying an extra sensor separately.
Finally, confirm battery sizes and whether cells are included.
Our top 3 picks at a glance
-
1
Best for quick battery powered checks
Newentor Weather Station Wireless Indoor Outdoor Thermometer
9.7/10 our score
See it on Amazon -
2
Best for solar sensor power with backup
Ambient Weather WS-2902 Wi-Fi Smart Weather Station
9.6/10 our score
See it on Amazon -
3
Best for battery backup at the console
La Crosse Technology Weather Station with Customizable
9.5/10 our score
See it on Amazon
Frequently asked questions
Can a home weather station run on batteries?
Yes. Some home weather stations run on batteries, while others use an adapter with battery backup or use solar power with battery backup for the outdoor sensor array.
Check the power needs of the indoor display and outdoor sensor separately.
A wireless sensor connection does not mean that either unit is rechargeable.
Do battery operated weather stations keep the display on?
Some displays stay lit only when connected to an adapter. For example, the Newentor Q3 enters an eco mode on battery power and lights for a 15-second glance before dimming.
If you need a continuously lit screen, check that the model supports it on batteries or plan for an outlet.
Do wireless outdoor sensors need batteries?
Many wireless sensors need their own batteries, even when the indoor console uses an adapter. The La Crosse C85845-INT sensor uses 2 AA batteries, while the Ambient Weather WS-2902 array uses solar power with optional battery backup.
Check the sensor's power method and battery type before setup.
Are solar powered weather stations battery operated?
A solar powered weather station may also use a battery as backup, but the solar panel and battery have different roles. The Ambient Weather WS-2902 sensor array uses solar power and offers optional battery backup.
Check whether the console also needs an outlet, since its power needs can differ from the outdoor array.
What batteries should I use in an AcuRite weather station?
Use the battery type and size specified for the exact AcuRite model and for each unit. The outdoor sensor and indoor display may use different power sources.
Our guide to AcuRite weather station batteries explains what to check before replacing them.
