Panasonic K-KJ17KHCA4A Advanced Battery Charger Pack with 4 AA eneloop pro High Capacity Ni-MH Rechargeable Batteries

The package states "up to 2550 mAh". The batteries themselves state "min. 2450 mAh". Most rechargeable AA batteries are 1.2 volts while the non-rechargeable (alkaline) are 1.5 volts. But this charger will charge these batteries close enough to 1.5 volts that I can use them in a digital camera that takes AA batteries. If you check youtube you'll see people showing the voltage after charging. And the charger turns off when it's done charging that particular battery. You don't have to charge in pairs. And you can mix and match AA or AAA batteries while charging. And the charger is supposed to work on 110V or 240V input so you can use this overseas. I can tell you this, these batteries last a long time. I can easily take 1000 photos (without flash) and still have enough power left for at least a 20 minute video using that camera. The only negative is they are bigger around than alkaline AA batteries, so they won't fit every application. I use much less expensive rechargeable batteries in my Spinbrush toothbrush because they fit in the handle while the Eneloops were too tight. I've read reviews on other sites where people say this charger gets too hot and still doesn't charge the batteries. I know it sounds simple, but Panasonic covers the positive side of the charger with a black piece of paper for shipping and storage. You have to remove the paper to use the charger or the batteries won't make connection (and that probably leads to the heat problem... and no charging). This black paper cover fits tight and is hard to see so perhaps some people didn't notice and just plugged it in as soon as opening the package. If you do that, the batteries won't charge and the charger WILL get hot. And the package doesn't say anything about removing that paper shield. All in all, these batteries and this charger have exceeded my expectations and I highly recommend them for power hungry application like a digital camera.

Panasonic eneloop pro AA 4 Pack + 4-position charger Purchased Nov 10, 2019. All I gotta say about these batteries, I added them Nov10 into my flash and they still working. I have a good, hard flash each time. Oh and what's great it has a charger in the pack. Just wished the price was a little cheaper but you get what you buy..that's the saying.. they are great batteries.