Eneloop Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA 2100 Cycle Rechargeable Batteries | Includes Charger and 4x Aa Eneloop 2000mah Nimh, Up to 2100 Cycles, Charges Aa and Aaa Individually

I have not used the charger as yet (have been charging the batteries using another charger) but the batteries work well and are brilliant as usual, as expected from Eneloop batteries and Panasonic. These AA batteries like the AAA batteries maintain their charge better than others whether actively used or not. They have a great shelf life and maintain 70 % of their charge capacity even after 5-10 years(not sure whether its 5 or 10 as I have not stored or even used them that long) when stored without use as suggested by the manufacturer. Many experts and regular users also have tested and verified the claim to be true even if I personally did not get that chance. The pack of 4 with the charger is pretty expensive, but then again it should be more than worth it if the charger functions well (and charges the batteries safely and fast) and if the each battery actually lasts 2100 cycles each, I of course have not reached anywhere near so many use cycles just yet so cannot verify the veracity of the claim personally but the reputation with people speaks for itself. The batteries come per-charged (using solar energy) and can be used straight out of the box (not sure if the charge lasts the full cycle though on first use) Currently they are working perfectly fine, so overall a good buy.

I’m using this charger for about 2 weeks and charges a couple batteries with it and I’m really happy with the purchase. It comes with AA Eneloop batteries (4 of them), which are made in Japan and can be recharged over 2,000 times without losing performance! The charger itself is robust and well-made. I’ve used it to charge not only the included Eneloop AA batteries but also other rechargeable AA and AAA batteries. It’s flexible, allowing you to charge one battery at a time or up to four at once, which is super convenient. Plus, it plugs directly into a wall outlet, making it easy to set up and use. Since it’s Panasonic, I feel confident in the safety and reliability—no worries about overheating or electrical issues. The brand is trusted, and the quality shows in both the charger and the batteries. All in all, this is a fantastic, reliable product that’s definitely worth the investment.

Excelente!

I am impressed with the Eneloop batteries. After hearing so much positivity about these rechargeable batteries, I decided to give them a go. In short they're the best batteries I have used. I needed an alternative to my Xbox Series X Controller battery pack after my powera recharging station gave out. In the few months I have used, Eneloop lasts longer and I have to charge less frequently even after long hours of gameplay. I estimate I get at least 20-30 hours of gameplay, however your's will vary because I use no vibration settings and dim Xbox light on controller and that conserves a lot of battery. Definitely simple and easy to use, the charger works with the aaa eneloop batteries, I also decided to buy and use for my remotes. The charger is quality and not a cheapo junk. This is the real deal, I have seen someone Get over 10 years use out of these batteries. These won't work on certain devices, these are Nickel-Metal Hydride NOT Lithium. So for certain devices you may have to research if they work, some reviewer said they do not work with Gameboys because of the output, you just have to research and figure out before hand. For my uses they work great, I can highly recommend if you are a Xbox Series X Controller user they are the best rechargeable technique I have used thus far for my Xbox.

First time it may not last long but eventually it will. So wait for couple of days