Blink cameras use AA lithium batteries, two per camera

Most Blink indoor and outdoor cameras run on two AA lithium batteries. Lithium batteries last longer than alkaline ones in these cameras—typically 2 years or more depending on how often motion detection triggers. The camera will send you a notification when the battery is low, usually when you have a few weeks of power left.

Some older Blink models and the Blink Video Doorbell use different power sources. The original Blink (first generation) also takes AA lithium batteries. The Blink Video Doorbell connects to your home's existing doorbell wiring instead of using batteries. If you own a Blink Mini, that camera plugs into power and does not use batteries at all.

You can use alkaline AA batteries in a pinch, but they drain much faster—sometimes in just a few months. Lithium batteries are worth the extra cost because you will replace them far less often and they perform better in cold weather.

Key Takeaways

  • Blink cameras (except Mini and Video Doorbell) use two AA lithium batteries that typically last two years or longer.
  • Alkaline AA batteries work but drain in a few months, making lithium batteries the better choice for most users.
  • The camera sends a low-battery notification weeks before the batteries die, giving you time to order replacements.
  • Cold weather drains batteries faster, so expect shorter life in winter or outdoor installations.
  • Always replace both batteries at the same time, even if only one reads low.

How to replace batteries in your Blink camera

Start by locating the battery compartment on the back or bottom of your camera. You will see a small door or panel—gently slide or pop it open. Some models have a small notch or arrow showing which direction to slide.

Remove the old batteries by gently pushing them out or lifting them with your fingernail. Do not force them. Insert the two new AA lithium batteries with the positive end (+) facing outward, toward you. Close the battery door until you hear or feel it click into place.

The camera will restart automatically. You should see the LED light blink or turn solid, which means the batteries are recognized. Open the Blink app on your phone—the battery indicator should now show "good" or a full battery icon. If it still shows low, remove the batteries, wait 10 seconds, and reinsert them.

Why lithium batteries work better than alkaline

Lithium AA batteries maintain a steadier voltage throughout their life, which means your Blink camera performs consistently until they are nearly dead. Alkaline batteries lose voltage gradually, so the camera may start missing motion events or sending delayed notifications weeks before the batteries are completely empty.

Lithium batteries also handle temperature swings better. If your camera is mounted outside or in an unheated garage, lithium batteries will keep working in cold weather when alkaline ones would fail. This is especially important for outdoor Blink cameras in winter.

The upfront cost of lithium batteries is higher, but you will buy them far less often. Most users replace lithium batteries once every two years or more, while alkaline batteries might need replacing every three to six months with regular use.

Common mistakes that drain batteries faster

The most common mistake is setting motion detection sensitivity too high. If your camera triggers on every passing car, tree branch, or shadow, the motion sensor runs constantly and drains the battery much faster. Lower the sensitivity in the Blink app until you catch the motion you actually care about without false alerts.

Placing the camera in direct sunlight or extreme heat also shortens battery life. Heat makes the batteries work harder. If possible, mount outdoor cameras in shade or under an eave.

Using alkaline batteries when lithium ones are recommended will make you replace batteries much more often. Mixing old and new batteries in the same camera can also cause problems—always replace both at the same time with fresh batteries of the same type.

Leaving the camera in a cold garage or outdoor location without protection will drain batteries faster in winter. If your camera sits unused for months, remove the batteries to prevent them from leaking or corroding inside the device.

Where to buy replacement batteries

AA lithium batteries are sold at most grocery stores, drugstores, hardware stores, and online retailers. Common brands include Energizer Ultimate Lithium, Duracell Ultra, and store-brand lithium batteries. Any AA lithium battery will work in your Blink camera—you do not need a special Blink-branded battery.

Buy batteries in bulk if you own multiple cameras. A pack of eight or sixteen AA lithium batteries costs less per battery than buying them one or two at a time. Keep a spare pack in a drawer so you have them ready when the low-battery notification arrives.

How long batteries last in different conditions

In typical use—a camera with moderate motion detection in a temperature-controlled home—lithium batteries last 18 months to 2 years. Outdoor cameras in mild climates may also reach 2 years. Cameras with very high motion activity, such as one pointed at a busy street or hallway, may need new batteries in 12 to 18 months.

Cold weather cuts battery life significantly. An outdoor camera in a climate with freezing winters may need new batteries every 12 to 15 months. Cameras in very hot climates also drain faster—heat accelerates battery discharge.

The Blink app shows battery percentage for each camera. Check it monthly so you are not surprised by a low-battery notification. Once you see the low-battery alert, you typically have 2 to 4 weeks before the camera stops working, which gives you time to order and install new batteries.

Frequently Asked Questions

Can I use rechargeable AA batteries in my Blink camera?

Rechargeable NiMH batteries work but are not ideal. They have a lower voltage than disposable batteries, which can cause the camera to report a low battery even when the rechargeables still have power. If you use them, expect shorter runtime and more frequent low-battery warnings. Disposable lithium batteries are the better choice.

What happens if I put the batteries in backwards?

The camera will not turn on. The battery compartment is designed so batteries only fit one way—with the positive end facing out. If the camera does not start after you close the battery door, open it and check that both batteries are oriented the same way, with the + side facing you.

Do I need to reset my camera after changing batteries?

No. The camera restarts automatically when you close the battery door and should reconnect to your Wi-Fi within a minute. If it does not appear in the app after 5 minutes, try removing and reinserting the batteries, then wait another minute for it to reconnect.

Why does my camera show low battery but still works?

Blink cameras send a low-battery alert when voltage drops below a certain point, but the camera can still operate for several more weeks. This is intentional—the alert gives you time to order new batteries before the camera dies. Once you see the alert, plan to replace them within the next few weeks.

Can I use a battery from a different brand?

Yes. Any AA lithium battery from any brand works in Blink cameras. You do not need Blink-branded batteries. Energizer, Duracell, Amazon Basics, and store brands all work the same way. Buy whatever AA lithium batteries are cheapest at your local store.