PUJIMAX Rechargeable AA Batteries Lithium with Charger,High Capacity 4255 mWh 1.5v Rechargeable Li-ion Double A Batteries for Blink Camera Smart Doorbell Smart Lock 4pack

As described. Nice charger.

I bought this for my blink camera, because I didn't want to burn through lithium batteries. I've had these in my camera for a couple weeks now and can confirm they work and work well. I'm still using the first pair with the second pair ready to go when the first ones need recharging. I am very happy with these and glad that I found rechargeables at work

Pros: High Capacity Cons: NOT as listed Opinion - rated capacity comes up short and proprietary charger is a bad deal to me. Test Results Price per battery $3.53 with charger (only works on their batteries) (Price can be due to special or deals offered) Results range Low 2269 to high 2428. As seller listed 4425 mWH (2836 mAh). This is about 14% to 20% lower capacity. Trying to find good/accurate batteries (mainly lithium-based) – many to choose from and they vary in price. Looking for low-cost to output. I am not an expert but just a “savy” consumer. I am not compensated for doing this. Using XSTAR VX4 (designed to measure 1.5v lithium AA/AAAs). I also use an ATorch load tester and compared it to VX4 and seem similar. You may see batteries listed as mAh or mWh. Note that mAh is capacity and mWh is energy (Watt is power but..) and they are not the same but if you know the voltage and know mWh or mAh, you can calculate the other. To help out use this formula: mWh = mAh * voltage. As testers will output in mAh that is what I focus on. In reality, even the mAh ratings listing on battery or touted by the seller listed may not be correct (usually lower so a 1000mAh batter may test to have a capacity of 900mAH for example). In testing there is a variance of =/- x% but none of that is provided and as stated earlier the capacity is normally lower than the rating listed. So, testing the capacity (vs price) is important to me. Why should you pay more for a battery with less performance. Durability and function are factors but challenging to do as I do not have the time/ability to run many cycles through the batteries. I may also do an extra test of draining battery on a high drain device (flashlight).

The largest capacity I can find at the same price.

If you want rechargeable lithium's that "behave" like disposable lithium's, these are for you! Because they are NOT CONSTANT 1.50v, it allows the battery capacity meter on your device to show you when you need to recharge them rather than putting out 1.50v until they can't, and then turning off abruptly with no warning. *NOTE: 1.0mWh=0.666mAh. Ni-MH batteries are rated in mAh but lithium's are often rated by mWh. If you multiply mWh by 0.666 you get mAh. If you multiply mAh by 1.5 you get mWh. e.g.- 3,000mWh=2,000mAh. 3,000mAh=4,500mWh. These "4225"mWh (2,816mAh) lithium AA batteries are only about 3,600mWh (2,400mAh). The advertising is misleading because it says "constant" 1.50v and they anything but "constant." They only produce 1.50v for the first 1833mAh out of about 2400mAh. With that said, they are a GREAT replacement for disposable lithium's and superior to Ni-MH rechargeables. They "behave" like disposable lithium batteries. When fully charged, they output OVER 1.61v!! This gradually drops to 1.50v after about 2,750mWh (1,833mAh) has been used. Then the voltage begins to drop pretty fast. The 3 best of the 4 batteries I got all maintain 1.20v after 3.563mWh (2,375mAh) has been used. The chip inside shuts them off at about 1.11v after about 3,675mWh (2,450mAh) has been used, which is their total capacity at a discharge rate of 200mAh. The chip inside prevents them from over-discharging; a feature you don't get with Ni-MH rechargeables and is often causes of death for Ni-MH batteries. This charger will charge ANY lithium AA or AAA!! If you have different brands of lithium rechargeables, you NEED to own this charger!! It is like a Tenavolts charger, but newer and has a USB-C input instead of Micro-USB. What makes this charger (and Tenavolts) so good is it relies on the chip in the battery to decide how much to charge them rather than the chip in the charger making that decision. A common problem with lithium rechargeable AA's and AAA's is the charger doesn't detect them, so they won't charge. This charger will charge any "stuck" batteries that other chargers won't detect and/or charge. It also guarantees your batteries are fully charged.

These don't last very long, 3000s last 3-4x as long per charge. Best part of this is the charger. Might be good for some lower draw uses like remotes and the like, but for my doorbell camera these don't even last a whole week.

Work great

Charged quickly and ready to use within a few hours.