D Cell Batteries USB and Type-C Rechargeable Lithium Ion D Batteries 1.5V 5000mAh with Built-in Safety Protection Chip D-Batteries (2 Pack)

Great product, for the first 7 months. Now, one of the batteries is not charging properly. I use the USB port and splitter provided in the pack. At first I was really excited, but now that I’ve had them a while, that one is breaking down already. If they lasted longer these would be a home run.

They work great, seems to hold a charge very well. But they are a pain to charge, the plug is needlessly difficult to attach. And the little charger cord is so short it's difficult to find a place to plug it that nots difficult. Otherwise, they seem to be great.

Placed 4 in an LED lantern, worked once, all dead after 3 months sitting in lantern unused, 2 of 4 won't charge. 1 charge LED flashes very fast, other no light at all when trying to charge.

These work very well. The only minor downside is they aren’t as energy dense as the regular batteries. But that’s a minor con considering they can be recharged.

Used 2 D size batteries in a minnow aerator for 24 hours at 25⁰f. They seemed to still be working fine when I took them out to charge.

Cumple su función, y que se cargue por USB es una genialidad. Viene durando bastante.

Just got them, they lasted four hours and 10 minutes after a full charge in a 2d Maglite with an incandescent lamp. I verifief this with my in home surveillance system, putting the flashlight in front of a camera and looking at the footage the next day. The two different USB ports for charging are great! The batteries don't weigh very much though, therefore it's a foregone conclusion that they don't store a lot of power. Normally I will be using them in a 2d Maglite with an LED lamp.

Did not pay attention at the power rating when I made the purchase. 6000 mAh is more typical for a C battery than a D. These did not have enough "juice" to replace the non-rechargeable batteries I was using.I purchased these because of convenience since they do not need a separate charger. However, the tops with the charging ports had a tendency to pop out and I found it difficult to get them back down into the battery. One of the charging ports got bent when I tried to push them back in which made it impossible to recharge so I returned them.With all the favorable ratings, it looks like others have had better luck than me, but most of those ratings are for the AA batteries.