Rechargeable AA 1.5V Lithium Batteries 8-Pack, Full-Recharged Long-Lasting 3500mWh High-Capacity 2300+mAh Dual A with Fast Charger Combo for High-Tech Devices, Blink Cameras, Cycle Times 1300x

Updated 12/09/2023 Battery died today after another week but the doorbell averaged 170 clips per day for the that week. Sucks the doorbell is ignoring my motion zones and keep recording cars driving by. Updated 12/02/2023 It's been a week since I've been using a set in my ring doorbell. I did another test to see the remaining mAh. Testing the two batteries in series had a remaining mAh of 721 which is 16% remaining as full it was 4543 mAh with (two cells in series). This may seems like it dies quickly which it did but my door bell gets triggered 100+ times per day. So I'd call that a win! I recently purchased this rechargeable battery for my devices and decided to put it to the test using the ET5410A+. The test results were impressive, with the battery delivering a capacity of 2189mAh, which is a commendable 94% of its rated capacity at a moderate discharge of 0.250 amps with a voltage of 1.48 during testing. I'm currently using a set of these batteries in my Blink Ring Doorbell since 11/25/2023, and they've been performing well. I plan to update my review once these batteries finally run out, but so far, I'm impressed with their performance and hopefully longevity. So far this rechargeable battery has proven to be a solid investment for my electronic devices. Highly recommended!

Trying select a rechargeable battery can be confusing. In my situation, I use the 8 rechargeable batteries in a Garmin GPSMAP 79 and an West Marine VHF radio. The requirement is that I need them to be chargeable from a portable solar panel and a portable charger. Having tried a different manufacturers lithium ion 1.5 v rechargeable batteries, it couldn't be charged with either of those devices. I was able to charge from both devices using these batteries with their charger. All eight batteries were able to fully charge. I can't say the same thing about the other manufacturers batteries I was trying. The reason for lithium ion over NiMH batteries is that you can get them with 1.5Vdc output whereas the NiMH are rated at 1.2Vdc output. In other words, you has less minimum voltage head room. Some electronic devices don't work reliable when the voltage dips under 1Vdc. Problem is that you only find out whether that's a problem through trial and error. My Gramin GPSMAP device is suppose to work with NiMH batteries, but when I tried some, the device would not power up. I can't tell if the problem is caused by Garmin electronics not really working with NiMH batteries or the batteries were faulty. The NiMM batteries both reported being fully charged and outputting 1.2 Vdc. The lesson I'm sharing is that picking out rechargeable batteries at this time seems to be a hit or miss endeavor seeing the number of complaints about DOA batteries. These batteries got a 3 or lower rating 19% of the time! so I guess that means the 81% of the time people found these batteries favorable. That's probably pretty good. The only real drawback to lithium ion batteries is that they can more easily combust making them a safety concern. NiMH batteries do not have this same inherent risk. So far in my testing process, these batteries have been meeting my needs. I like the small light weight charger it comes with. The round green light lets you know that the charger is getting power, Then there is a red or green led light above each battery. Red means that the battery is being charged and Green means that the battery is fully charged. The positive tip end of the battery contains a blue led light. (Yep, in the battery itself) If you look closely at the positive tip you'll still 4 small holes the that led blue light shines through. When placed them in the charger, it fairly easy to see the blue LED light. The blue LED light on means that the battery says it's charging. The blue LED light turns off when the batteries are fully charged. It turns out that the entire charger shuts off once it's fully charge. If you're fully charged you need to unplug and plug the charger if you want to see the green LED lights. When you first begin, you'll see the red light on and in a short time each batteries blue LED light will flicker. Eventually it will turn off and you'll see the green led light. And once all batteries have been charged the charger will just shutdown. It's seems to be one of the more intuitive charger designs on letting you know the status of the charging system. None of the chargers on the market seem to let you know the capacity percentage. I was somewhat influenced by a review paper on top rechargeable batteries manufacturers. That review rated CZVV as the top pick. We know that's all marketing, but I liked the evaluation methodology they used. CZVV's web site shows the battery composition; it looks simple and cleanly package. I also like the plastic battery cases it comes with. I still need a set of backup batteries along on my adventures. Please note that CZVV wants you to only use their charger with their batteries. Obviously you can't charge NiMH batteries with a Lithium Ion charger and vise-a-versa, but their recommendation is to also only use their batteries and their charging system. At first that may seem like folklore, but I got a strange feeling that pair batteries and charging systems, especially for lithium ion batteries at this time, is what you should aways be doing. Remember that the CZVV battery contains electronics that the CZVV charger may negotiate with (i.e.: fast charging or power sharing) . That's at least a rationale argument for why the battery and charging system need to be paired. I think it's a good thing that CZVV tells you not to mix manufacturer. I think that's absolutely true on the standard sized the lion ion batteries. The batteries are rated at 3500mWh. I have no idea on what I actually get. It seems that most battery manufacturers seem not to actually produce there specification claim; but the truth is that the actual rating doesn't matter. All that matters to the user if the batteries last for a time enough to power their device till the batteries need to be recharged and that's actually a function on how much power your device uses and how inconvenient is it to change batteries. You won't know the answer until you actually try the batteries on the device your using. It seems you can't reliable trust mWh ratings when comparing batteries. It's best to think of that rating as a capacity category. 3500mWh means the manufacturer's high capacity AA type battery. As I've stated, so far I'm very impressed with these batteries. I'm only at the beginning state of evaluating these batteries. The next question of concern is: do they reliably recharge?. I'll be checking that out over the next 3 months, and will report on those findings. In other words how well they worked in the field!! At this time I feel pretty hopeful that they'll past my trial period.

So convenient, works as well as regular batteries. Last as long if not longer than regular batteries. Love them.

I’ve bought three twice, once in April 2025 and another in December. The original eight batteries were for our outdoor cameras, which work great. Battery life on those are good (approximately three months or so). There is quite a bit of activity on the cameras, so three months between charges for those cameras is great. I bought another set in December 2025, primarily for battery powered Christmas lights. Although they needed to be recharged frequently, they were running 24x7. Since these batteries either deliver good voltage, or they don’t deliver anything (ie no bulb dimming for the Christmas lights use case which is the case with disposable alkaline batteries). The eight batteries I bought in December 2025 likely alleviated at least 24 alkaline batteries from a landfill. Im pleased with the capacity. The batteries are not hot or warm either after continuous use or immediately after charging. The batteries can take anywhere between three to four hours to charge four batteries at a time. I’m happy with that given the high capacity, and cool to the touch recharge. If I need more, I’ll get another 8-pack.

These work alot better then expected. We were having hard time with our blink cameras and they kept suggesting lithium batteries. Every battery we tried just died so quick. These ones work well and last for weeks. My only complaint is they seem to just suddenly die. Every other battery, our blink camera would warn us that it was low, but this one will suddenly die. Not a huge issue for us as we stay on top of things, but just thought i'd throw that out there.

Charged these batteries up, but they do not power my camera.

They do the function at 100% if they give the low battery error as it happens with other batteries.

I bought these batteries specifically for an outdoor siren, since lithium batteries are known to provide a consistent 1.5v, compared to the 1.2 - 1.3v from Ni-MH, which is what I required for a nice loud siren. From my research both lithium and Ni-MH carry similar capacities/ mAh. I do not know if the Lithium ones also have a very slow discharge rate when not in use like the Eneloops but long story short lithium wins for providing a consistently higher voltage for devices that need it. I put 4 of these after charging in the siren which started acting weirdly. It seemingly connected to the hub but would not produce any sound. I thought the siren had gone bad. Reluctantly I swapped the batteries with the almost dead alkaline ones and it worked. I then put in fully charged Ni-MH ones from EBL which I had bought at the same time as these, and it worked again. I thought these lithium ones probably didn't have enough juice to power the damn thing. Disappointingly, before putting them away, I checked them one by one with a multimeter and sure enough one was completely dead. Putting it back in the charger, the blue/ red lights kept fluctuating for a few sec and then turned off completely as if it is completely charged per instructions. It still was dead. I have since put in 4 working ones of these and the siren is working. It doesn't subjectively sound any louder with the full 1.5v incase anyone was wandering lol. The durability/ reliability and (hopefully slow) discharge rate of these remains to be seen. The charger and batteries do not look cheaply made. Don't know if they come pre-charged fully but they seemingly topped off quickly (<45 min for all 8) on first charge. After buying ~60-70 rechargeable AA/AAA/9V batteries from Eneloop, EBL, Ansmann, Tenergy over the last 10 years with zero dead on arrival and most working up till now, I must say 1 out of 8 (12.5%) DOA rate is not great. I took the chance with a new brand and tech (rechargeable lithium AA), but I guess I'll stick to Eneloops even with the lower voltage, due to their excellent reliability, or will try the non-rechargeable lithium variants. Side note: The way lithium batteries provide a near constant 1.5V until they completely die, might lead many devices to inaccurately display battery percentages. When these batteries need a charge they don't fall down gradually like alkaline and Ni-MH (with the battery percentage reading showing that in most devices) but rather the voltage drops abruptly when they need a charge. So just FYI for devices that are vital/ emergency related, I would suggest vigilance and recharging them periodically without relying too much on the battery indicator.