TENAVOLTS 1.5V Lithium Rechargeable AA Batteries, AA Battery for Xbox Controller, AA Rechargeable Batteries for Blink Camera with USB Cable Type C Port, 1.8 Hour Fast Charging, 4 Count with Charger

I’m using these in a smart door lock, and they’ve been rock solid. They charge quickly, hold their charge well, and power the lock without any warnings, dropouts, or weird behavior. The charger is straightforward and easy to use, and the consistent 1.5V output does exactly what it’s supposed to — no issues like you sometimes get with rechargeables in smart devices. If longevity holds up over time, these will be an easy repeat buy. Very happy so far.

The first part of the graph shows regular energizers they lasted from 8/6 - 10/1 about 8 weeks. When they got below 15% they took forever to lock/unlock because voltage was so low. 2nd part is energizer rechargeable. Lasted from 10/5 - 10/23 about 2.5 weeks. On 10/23 they were at 15% but took forever to lock/unlock because voltage was so low. 3rd is Tennvolt. Lasted from 10/23 - 12/9 about 6 weeks. The Tennavolts have a xfmer in it that keeps the voltage as 1.5v until they're dead so you get consistent voltage the entire time. Also, the Tennavolts were used in the coldest temps so I expect they'll last longer in the summer. So yeah, regular batteries are going to last longer but when they get low voltage is low so a motor on a smart lock crawls. Same with energizer rechargeable. The Tennavolt's are fantastic, they don't last as long as regular batteries but blow past energizer rechargeables. It's a happy medium. The only downside is the upside, the xfmer that keeps voltage consistent. Because the voltage never drops anything that monitors voltage to let you know the batteries are dying generally won't wok. & if they do it'll tell you with hours to a day of when the battery dies. It is what it is, just figure how long they'll last & change them accordingly. For me, i'll change/charge the batteries every 4 weeks & I'm happy with that.

So far, these batteries work very well in Blink cameras. We go through battery changes pretty fast in our doorbell, since it's in a high traffic area (about every 3 months) so hopefully these will live up to their expectations. They seem to put out consistent voltage, and we don't get a "low battery" message with these. The charger works very well and even indicates when it's done charging.

The blue LED in each of these 1.505V digital power bank cylinders is great for seeing the energy situation inside. Gave a few sets as gifts, whenever a coupon is offered.

I had these recommended to me by a fellow Quest VR headset user. They work perfectly with my controllers. Like all lithium batteries, they do "drop" quickly once they get to about 70% battery life remaining. The charger is easy to use and effective. (I actually bought this 4-pack for my husband to use with his waterpik, but I know these batteries work and have had a long lifetime already -- more than 18 months with my Quest, which gets heavy use.)

Pros 1. Faster charge rate （but still not fastest because you need to prepare the power adapter yourself） 2. stable voltage for electric toothbrush and controller. Cons 1. Battery has shorter life cycle than the Nickel–metal hydride battery. 2. relatively expensive

I have a Homekit/matter/thread/bluetooth smart lock for my front door that chews through batteries - even with 4x NiMh AA's I have to charge the batteries every couple weeks. These batteries do great due to the built-in regulating circuits that keep the voltage at 1.5v (vs 1.2v for normal rechargeables). Same for my battery operated holiday lights - these can go a few nights straight before charging rather than needing to be recharged each day.

Great in my Blink camera.