Blink cameras run on two AA batteries and the battery choice matters more than most buyers realize. Use the wrong type and you will be climbing a ladder to swap batteries every few weeks instead of every two years. Use the right type and the Blink Outdoor 4’s two-year battery rating is achievable in real-world use. Here is exactly what to buy and why.
What Blink Officially Recommends
Blink’s official recommendation is straightforward: AA 1.5-volt lithium non-rechargeable batteries. Specifically, Blink names Energizer lithium batteries as the preferred choice. This is not a generic recommendation as Blink’s support documentation calls out Energizer lithium specifically because the batteries are designed to maintain consistent 1.5V output from full charge to near-depletion, which is what Blink cameras require to function reliably.
The Energizer Ultimate Lithium AA is the specific product line Blink endorses. These batteries are widely available in 8-pack and larger multi-packs — buying in bulk keeps the per-battery cost reasonable given that lithium batteries already cost more upfront than alkaline.
Why Lithium and Not Alkaline
Alkaline AA batteries technically work in Blink cameras but perform poorly enough that Blink advises against them. Three specific problems:
Short lifespan. Alkaline batteries in a Blink camera typically last 2-4 weeks under normal use and not the two years lithium achieves. The reason is current demand. When a Blink camera activates for motion detection, recording, or live view, it draws a high peak current briefly. Alkaline batteries struggle to supply that peak current consistently, which causes the camera to drain the batteries significantly faster than their rated capacity would suggest.
Cold weather failure. Alkaline batteries lose up to 50% of their capacity when temperatures drop below freezing. For outdoor Blink cameras in northern climates or anywhere temperatures drop below 32°F in winter, alkaline batteries can fail entirely or produce so little power the camera stops functioning. Lithium batteries maintain consistent output from -40°F to 140°F — they are specifically designed for this operating range.
Leakage damage. Alkaline batteries are prone to leaking as they discharge, particularly when left in a device for extended periods. Battery leakage inside a Blink camera can corrode the battery contacts and void the warranty. Lithium batteries do not have this leakage problem.
Can You Use Rechargeable Batteries?
This is the most common question Blink camera owners ask. The right answer has two parts.
NiMH rechargeable batteries — no. Standard rechargeable AA batteries use nickel-metal hydride chemistry and output 1.2V rather than the 1.5V Blink cameras require. This voltage difference causes inconsistent performance, premature low-battery warnings, and reliability issues. Blink explicitly does not recommend NiMH rechargeable batteries.
Rechargeable lithium AA batteries at 1.5V — yes, with caveats. A newer category of rechargeable lithium AA batteries maintains the full 1.5V output that Blink cameras need. Brands including Energizer and Pale Blue make rechargeable lithium AA batteries at 1.5V that are compatible with Blink cameras. These cost significantly more upfront than standard lithium batteries but can be recharged hundreds of times, which makes the long-term cost lower. The Pale Blue rechargeable lithium AA batteries are a well-regarded option in this category — they charge via USB-C and maintain the 1.5V output throughout the charge cycle.
The practical tradeoff: non-rechargeable Energizer Ultimate Lithium batteries are simpler. Buy them, install them, done. Rechargeable lithium AA batteries require a charger and the discipline to swap and recharge on a schedule. For cameras in hard-to-reach locations where removing batteries for charging is inconvenient, non-rechargeable lithium is still the easier path.
How to Maximize Battery Life
Beyond battery choice, several settings in the Blink app directly affect how long batteries last:
Clip length. Shorter motion clip lengths use less battery per event. The default is 5 seconds — reducing it to the minimum your use case requires extends battery life meaningfully for high-traffic cameras.
Retrigger time. The retrigger time setting controls how long the camera waits before recording another clip after detecting motion. A longer retrigger time means fewer clips recorded per hour in busy areas, which preserves battery. The tradeoff is potentially missed events.
Video quality. Higher resolution requires more processing and more battery per clip. For cameras primarily used to confirm motion rather than identify detail — a back gate, a side yard — dropping from 1080p to 720p extends battery life at a modest quality cost.
Live view usage. Live view is the single largest battery drain. Every minute of live view consumes significantly more battery than motion-triggered recording. Minimize live view sessions on cameras where battery life is a priority.
Temperature. Even lithium batteries lose some capacity in extreme cold — not as much as alkaline, but some. Cameras in very cold climates will see shorter battery life in winter regardless of battery type. This is normal behavior and not a defect.
WiFi Strength. A consistently weak signal between the sync module and camera requires causes faster battery drain. Check the strength meter in the app to ensure the best possible signal to minimize battery usage.
Quick Reference
| Battery Type | Compatible | Expected Life | Cold Weather |
|---|---|---|---|
| Lithium AA 1.5V (non-rechargeable) | Yes — recommended | Up to 2 years | Excellent |
| Rechargeable Lithium AA 1.5V | Yes — with caveats | Varies by usage | Good |
| Alkaline AA | Not recommended | 2-4 weeks | Poor |
| NiMH Rechargeable AA 1.2V | No — wrong voltage | Not suitable | Poor |
Bottom Line
Use Energizer Ultimate Lithium AA batteries. Blink recommends them specifically, they last up to two years under normal use, and they handle temperature extremes that would kill alkaline batteries in days. Alkaline batteries work technically but drain too fast and risk leaking. NiMH rechargeable batteries are incompatible. Rechargeable lithium AA batteries at 1.5V are a viable alternative if you want to avoid the ongoing cost of non-rechargeable batteries — just confirm the 1.5V output rating before buying.
Shop Energizer Ultimate Lithium AA on Amazon
See also: How to Run a Blink Camera Without Batteries and How to Change Batteries in a Blink Camera.
This guide is part of our Blink Security Camera Hub
