CH4-57AU 4 SLOTS PORTS kenlti AA AAA charger with 4 x 1.5V 3000mWh lithium li-polymer li-ion AA rechargeable batter for LED falshlight Digital camera Microphone

I have used these for years , initially in my NV due to them needing 1.5v (regular rechargables are 1.2 and won't work correctly) and it eats through batteries. Single use alkaline/lithium batteries ain't cheap these days. I was needing a battery for my frother and didn't have any alkaline (what I normally use) so I used one of those. The difference was amazing, the frother worked better, didn't bog as easy and these batteries last several week's of use. There are two downsides though (aside from initial cost): you have to use their proprietary charger and they batteries are 1.5v or 0.0v, all or nothing, no in between there is no fade (Likely due to internal protection circuitry) like most conventional batteries.The up side is that you get good operation through out the charge, the bad news is that you don't get a warning so keep in mind and/or extras

solid batteries, almost as good as the one time use lithiums with just slightly less life per charge, really like these. best rechargeable batteries ive ever had, and i used to hate rechargeable batteries because they'd never last long enough. i use them in pro camera flashes, i can over heat them when im shooting, but its an extreme use case

Bought these to use in blink cameras because energizer lithiums are spendy$$. The cameras work well with these batteries. They dont last quite as long as the energizer, but these are rechargeable.Only down side in my opinion is the mah rating is a complete lie. But i expect that from amazon batteries.I would buy again and i would recommend them.

If you are looking for the ideal battery alternative to the regular 1.5v alkaline, these are it for most electronics. They are Li-On Polymer which is superior to Ni-MH rechargeables in density and holding a charge, even superior to regular Li-on batteries.The only problem I had was with a 25 year old Walkman radio and a 33 year old travel Radioshack radio. For some reason the AM receiver would not work, I would just get static. I rechecked the integrity of the radios by replacing the Kentli Li-Ons with Ni-MH and the AM would work fine.These Kentli batteies require the Kentli charger, not any Li-On charger will work. But there are some competitors appearing on the market. And avoid the non- rechargeable Li-Ons by the 'energy bunny' as they don't hold a charge as I found out to my disgust. These batteries are recently hard to get.

I don't know anyone else that makes this type of battery. They are a bit pricey, but they're pure genius in the way they're constructed,.. like a battery within a battery,.. the secondary battery keeps the main one charged, so there is no drop-off in voltage as with all other types. For some applications, like my thermal rifle scope, there is really nothing else that works. And of course I also use them for flashlights and other gadgets that require a AA or AAA battery. Highly recommended!

So far the batteries seem to be working okay I haven't had a long enough to know. Thing I'm concerned about is the battery charger it doesn't seem to have very accurate safety measures. I don't think many people realize this but anytime you recharge a battery and it gets any warmer than room temperature and starts putting off any kind of heat that is due to overcharging, the battery gets hot and releases the excess energy as heat. This is not a good thing and when I charge these batteries I usually end up having to unplug them three or four times because batteries are almost too hot to the touch heat destroys batteries and these battery chargers are obviously not up to the task of shutting these down when they reach a certain voltage cutoff which would prevent them from getting hot. FUN FACT, did you know that when a lipo battery such as these catches on fire they can and usually do burn in excess of 2000 degrees Fahrenheit?

I purchased these batteries 3 years ago while searching for AA lithium batteries to use in my Canon EOS DSLR camera, which sucks the life out of batteries. I have a camera grip which accepts 6 AA batteries. Using regular rechargeable batteries I get about 4 hours of use, with these, I get a lot more time. I have used the same batteries for over 24 hours of use, not including storage time. They have lasted up to 4 months in my camera and so far 12 months on the shelf. I have charged them t least 10 times and have not had a failure. Another thing that is great about Li-on batteries is that they weigh less, making the camera lighter or what ever you are holding or carrying. They take about 2.5 hours the recharge using the KENTI CHU4 charger. This is the only charger that can be used with their batteries. Will be purchasing more and another charger, I would definitely recommend. I also use them in my Powershot SX12IS and a few flashlights.

I bought these because I purchased a new Blink Home Security system. The blink cameras have a 1.5v lithium ion only sticker on the inside battery compartment. That being said, I thought these 1.5v lithium ion batteries would get the job done. However, upon installing the batteries into the cameras they don't work at all. I then put them into a charging station to verify charge. Some don't even read on the battery charging station, and some do. I feel that I either received dead on arrival batteries or they are just overall junk. I took one and tried to use it in a flashlight and it won't even turn an LED flashlight on. Based off my experience, from 2x sets of 4x batteries all 8 are nice paper weights.Edit: 5/7/19. Company doesn't want to accept responsibility for DOA batteries. DO NOT BUY FROM THIS SELLER. I now have a bunch of worthless batteries and they have all my money. I would had more pleasure seeing my money go down a toilet bowl than give it to this company.