POWEROWL Rechargeable D Batteries 10000mah Low Self Discharge, NiMH, Pre-Charged, 4 Count (Recharge Universal)

Batteries and charger worked great. I really like the fact that you can charge AA, AAA, C and .D

If you are like my mother you probably have a lot of devices like fake candles and lanterns that take either AA, C, or D batteries. These tend to last a while but you will go through a lot of batteries when you could just buy a rechargeable version and only have to recharge them when they run low. I have only 2 things in my house that run off of D batteries so this was a perfect way to stop using all the alkaline batteries I have and I can save them for emergencies instead of using them for everyday lighting that will be on every day/night. They pay for themselves soon enough.I use my Nitecore intelligent recharger to charge these batteries and they do hold around 10,000 mAh of energy so charging them even at 2000 mA will take about 5 hours and they can get very hot, if you don't know how to properly charge these batteries I suggest getting the special chargers that are built specifically for them but if you know how to charge normal AA/C rechargeable batteries, as long as the D fits in the charge port then there is no difference in charging methods, it still -dV/dt (don't worry if you don't know what that means)

I don't normally write reviews, but these things are ridiculous. I purchased 2 sets of four 'D' batteries as I had a device that required eight of them to power it. I also purchased a high capacity charger just for these batteries. The charger can handle 8 batteries at one time and had a 'slow' setting in addition to the normal 'fast' charge it could use to charge the batteries. I opted to use the 'slow' charge as I felt the initial charge should not stress the batteries. It took nearly 20 hours to charge these batteries...and I charged all of them at the same time, not one after the other. The charger was rated to be able to charge them in half that time o0n ;slow', so these obviously have much more capacity than anyone expected. I used the batteries for a few hours and they're still going strong, all on the initial charge I gave them. They are rated at 10 AMPS each, so they should outlast any other comparable battery. I will definitely get more of these as needed.

I have several "smart chargers" that allow you to control and monitor everything about rechargeable batteries. They've prolonged my 50 eneloop batteries for years. Finding D sized rechargeable batteries doesn't offer a lot of choices so I gave these a shot. They come with an inexpensive dumb charger that is a plus as they're hard to find. They show red and then green when full. When I place a charged D battery from the dumb charger, they show as 72% on all the smart chargers. Forcing them to continue to takes days and some get to 100%. As I only use these for auto opening trashcan lids, I'm not sweating it, they still save me money on the 2nd year on. Last for months so it's all good. If you're using these for anything else, just try them out for a couple weeks to make sure they'll do the job. They do seem to hold a charge pretty well as receiving them years after manufacturer date still had almost 40% left. Also some makes, not this one, are just AA batters put inside a bigger case, so they can't last long, others have a USB port built in to charge, which might be ok, but I didn't want to want those either because they obviously take up room inside and aren't real batters. For all I know these too have that and are just sealed but I'll post back if they less than a year in the device I use as that's what I've been getting with all of them using regular alkaline cheap ones. So I'll give this 4 stars for now and if they fail in any way I'll update the review. Not thrilled they're made in a way to look just like eneloop hoping people will shop quickly like I do and not notice but so far so good.

I have been using these batteries over two weeks by charging them twice a week while I was using them in my flashlights and my small project power station is it power source to test d programming boards and small electronic devices. These so far have been the best rechargeable batteries that I have ever owned, as they don't heat up because they can handle high discharge rate and they are leak-proof and I assume they do have low this charging rates than they are not in use, so they keep the energy while in storage mode for a long time. And they also accurate on their capacity rate, it takes a full charge for full capacity and it really last long even though van I use them heavily on my big outdoors LED and non LED flashlights. Once I got them in my hands I realized how quality they feel they are definitely heavy which tells me that they got a good structure in them and also if when you drop them they don't vent so that's a quality battery right there out of the box. I definitely we commend these batteries especially after seeing how they perform and have they are accurate to what they described in their specifications. I have ran a couple tests and charge them multiple times and I use them in outdoors big flashlights that they were on for hours these are good batteries to use for any purposes.Update:These batteries are the best out so far.I have been using rechargable batteries for long time, as an engineer it is essential for me save the environment by not using disposable batteries and efficient to use rechargable batteries in any case.There batteries are:Affordable.Well made.Quality material.Very high capacity.Slow discharge when not in use especially.Charges up to 1.55v for 10000mah and i even seen 10050mah, 10200mah ratings on my charger.No leakage and they don't overheat much (some do if i overcharge them, which is normal).Most importantly, they last long time!I am so glad that I found these batteries, kids can't do it without their toys or flash lights powered on, so it's crucial to have quality batteries like these powerowl batteries.I highly recommend these batteries if you are looking forward to save some money, save the environment from the disposable batteries and keep the stuff powered long time without any issue.Teaching my kids to sing:⚡⚡⚡ I've got the Power⚡⚡⚡