AA Lithium Ion Rechargeable Battery

these rechargeable batteries are handy. The multi USB charger cord provided lets you charge 4 batteries at once. You don't need to bother with wall chargers anymore. This is efficient. The charger cord works on other items too.

I found a 4 D cell battery flashlight in the garage. The batteries were dead, but it was nice and clean. Decided to upgrade it, switched it to Lithium rechargeables and replaced the old incandescent bulb with a LED. Works great, nice and bright, lighter too... Batteries can recharge in about 2 hours. It was nice to repurpose an old flashlight and bring it into the 21 century...

Most worked. One of the batteries in the pack already had a green light on and it does not charge the rest were fine and hold a charge. I use for nest sensor and has held a charge for a couple months

Last longer than other c drive batteries rated higher. Hope they last a long time and pay for themselves. Did a test with 2 Maglite. This brand lasts over an hour longer before going dim and is more affordable than other brand. Good value for money. Now to convert Maglite to led for longer life

The media could not be loaded. I made the mistake of trying to save a couple dollars from the brand I normally buy on Amazon and what I got was a horrible experience with these batteries that do not properly accept the USB type c plug because the port is not aligned with the battery casing, as you can see in the photo and in my video. You're going to scrape up and crush and ruin your USB type-c plugs trying to get them in, and worse you're going to short out the batteries.But that may not matter a lot because almost half of them, three out of eight, we're bad right out of the box with fast flashing green lights indicating trouble. Not that there were any instructions to tell me what that meant so I had to go digging on the net. It means a problem.Very poor manufacturing quality can't even align a case and a port and now I'm supposed to trust this in my home with my children not to create a problem?No, I'm not keeping these and they're going straight back to Amazon for a refund. I'm going to go back and order the more expensive ones which end up being much cheaper in the long run because they all work, all the time, and I would encourage you to buy a different brand than this one.In case any of the above is unclear, I absolutely DO NOT RECOMMEND these poorly made and possibly dangerous batteries.

Have not used the batteries yet but they took a charge good and seem to be made well. I really like that they are not as heavy as regular alkaline D batteries. The only thing negative is the charging cables are too short.

Nice batteries. Just right for my rangefinder

I purchased these USB-C rechargeable batteries for a battery-powered pet door, which requires four new batteries every 1–2 months. After extensive research, I chose this option, hoping for longer-lasting performance and a break from constantly buying D-cell batteries. My goal was to save money in the long run while reducing environmental waste from disposable batteries.After more than six months of use, I've found myself needing to disassemble the door more frequently to recharge these batteries compared to when I used disposables. They seem to provide less power to the door’s motor and electronics, leading to more interruptions. Because of this, I’ve decided to return to disposable batteries for this application and will not be purchasing more rechargeable batteries for similar uses.I truly wish the technology were more comparable—or better—so that USB-C rechargeable batteries could offer longer usage between charges than traditional single-use batteries.