Rechargeable C Batteries 4 Pack with 4-in-1 USB-C Charge Cable, LR14 1.5V 5000mWh Li-ion Battery - 1200 Cycles for Floodlights, Toys, Clocks, Emergency Lights

what can I say? They charge to capacity in about 2 hrs and last longer than big brands ' use D batteries. They may keep going and going, but these can take a break and never need to be thrown away. I found these batteries to last, as long, if not a bit longer, as the alternative...

Good idea, love it

Sadly, one dead battery (so 25% of the value of this) is dead. I cannot use it for why I bought it, and I already disposed of the package and cannot return it.UPDATE manufacturer took care of me.

Got these for a baby swing and they work great. Don't have to spend a fortune on batteries just recharge these. They charge in a couple hours and I've gotten many more of use on one charge.

I bought 2 packs (8 pieces) of these lithium AA batteries and used them for my camera flash. I installed 4 pieces, and powered up my flash. I realized the flash charged up it's internal capacitor so quickly... in a very abnormal way compare to when I used regular nonrechargeable batteries. I quickly took the battery out to investigate the problem. One of the four batteries was hot to touch like a thermal runaway had occurred. It was so hot to the point I had to quickly ran out with it to an open yard and leave it on a concrete floor, then covered it with metal bowl to prevent an explosion or fire. Luckily, no explosion occurred. The battery took about one hour and slowly cool off. After that, I used a volt meter to measure the defective battery and the meter read 4 volts without any load. This indicated that the built-in battery circuitry to regulate the battery to output 1.5 volt is malfunction. As a result, it was outputting what a regular lithium battery voltage without a voltage regulator, that's whopping 3.7~ volts (4~ volts without load) which a normal AA battery should be 1.5 volt. Next, I checked the voltage of the other three batteries which didn't get heat up and the reading were 4 volts, 1.5 volt, and 2.4 volts. Another hour later, did another voltage reading on the heated battery, and the voltage reduced from 4 volts to zero volt. You can imagine when just one battery goes bad can cause other ones go bad together, instead of 6 volts (1.5x4=6) you can get 14.8 volts (3.7x4=14.8). For safety concerns, please DO NOT use this product. Amazon should take this product offline.

Still working and long batery life.

We use the for our automatic trashcan lid. Very easy to charge and they are lasting a long time between charges. The cost is very worth it compared to replacing (2) D batteries every 3 months.

Batteries arrived and appeared to charge ok. I used two of the batteries on a Blink camera and seemed to work ok. However when these batteries needed to be charged, I used the second pair and one of those batteries was dead (no voltage). I tried to charge it again but the battery showed a 'quick blink' instead of the 'slow blink' that the other three batteries showed. when they were charged. The first two batteries recharged just fine and replaced in the camera. Based on one bad battery, I am not sure I would buy this brand again.