12 Pack 3400mWh Rechargeable Lithium aa Batteries with 12 Solt Charger

Batteries charge well, easy charging box.

Very good rechargeable batteries with a convenient charger. They work well and are easy to recharge. Like the case quality as well. Great value for an 8-pack, although I’m still testing their long-term battery life. Overall, a good option for everyday use.

El cargador es fácil de usar y las baterías cargaron sin ningún problema. Lo he usado una sola vez para cargar las baterías y, por el momento, todo ha funcionado muy bien. Me gusta que venga el paquete completo, así no tuve que comprar nada por separado. Algo que me gusta también es q te indica en verde la batería que esta cargada y puedes poner en el cargador la cantidad de batería que prefieras cargar. Aún es pronto para opinar sobre la duración a largo plazo, pero mi primera experiencia ha sido positiva y hasta ahora estoy satisfecho con la compra.

Batteries do not hold the charge very long

These rechargeable batteries were purchased for a game camera, and their battery life has been impressive. They have outperformed the standard batteries we had been buying previously. One battery in the set does not appear to charge, as that slot on the charging base remains red while the others turn green. However, this does not seem to affect performance when all of the batteries are used together in the device.

Great buy! Also charges my other rechargeable batteries!

My main use for these batteries is for the Blink Outdoor 4 cameras, so need the batteries to have longevity and especially to get thru the winter when changing batteries in cold weather and snow can be more challenging and problematic. I wanted lithium batteries due to their consistent power output in cold weather, which alkaline and Ni-Nh decline significantly during the cold. I chose these batteries for the above reasons and also because of the high 3500 mWh (total energy a battery can store and deliver) so they'd last thru the winter without having to be swapped out. First, some terminology for consistency: • mWh stands for milliwatt-hours and represents the total energy a battery can store and deliver. • mAh stands for milliampere-hour and represents the battery's capacity, indicating how much electrical charge a battery can hold. These are packaged nicely with a well built charging box. However, they don't charge anywhere close to the 3500 mWh advertised on Amazon; closer to 1000 mWh less, which is a huge difference (see screenshots below). I used a XTAR VX4 Battery Capacity Tester and Charger, which you can get on Amazon. Lithium batteries discharge at a consistent 1.5V from beginning to end, even when the charge is very diminished near the end of its charge, so a regular battery tester doesn't work as it would show a battery as being consistently and fully charged until there was about 0% charge left (eg. a 20% charged battery would show as 100% fully charged). This tester determines the mAh and the mWh by first fully charging the battery(s), then fully discharging them (the battery levels are determined here), then fully charging them again so you can use them (C-D-C). The mAh is not provided on Amazon's website, so I calculated it using the standard formula of mAh = mWh divided by the battery volts. So, 2266 (mAh) = 3400 (mWh on website) / 1.5 (battery's volts). Upon testing of all 12 batteries shipped, the mAh averaged about 1699 vs. the 2266 it was supposed to be, so a lot less. The mWh averaged 2552 vs. the 3500 it was supposed to be, again far lower than advertised. I included screenshots of all test results below (mAh and mWh are in separate screenshots). When I first saw the test results, I thought it was just a few of them perhaps defective, but all 12 tested in the same range, so that doesn't look like a defect but more like false advertising. The Energizer Ultimate Lithium AA Batteries (non-rechargeable) has an advertised mAh of 3500, which equates to a mWh of 5250 (mWh = mAh x 1.5 volts), far superior to these rechargeable. The cost savings of using rechargeables may be good, but battery performance is more important to me, so the Energizer one-time use are the way to go. Obviously, I've returned these. I've reviewed several other rechargeable Li-Ion batteries below, none that charge close to their advertised capacities: My XTAR Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/RSUM0LDFT2FPX My SincehHoly Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/R390K7RXXBV8VN My Delgeo Lithium (Li-Ion) AA Battery Review: https://www.amazon.com/gp/customer-reviews/R2OPXD8DHSCY37 My XTAR VX4 Charger & Battery Capacity Tester Review: https://www.amazon.com/gp/customer-reviews/RXTAHAOCCR0F5

Good product

Using for my outdoor security camera and is working well. Holds a charge great. I have them combined with a solar panel.

ok

Used in my outdoor lighted Christmas Wreaths each uses 3. On for 7 1/2 hours after which they grow very dim and the batteries need to be recharged. Don't know how many times they can be recharged before they will no longer take a charge. Just have to wait and see

The batteries charge only to 30% after only approximately 20 times recharging. I have 2 other brands and they are still charging to 100% after 60 times recharging. The batteries definitely are low quality batteries. I missed the return period and wasted money.

Very bad