I own several Amazon LED flashlights, which were partly supplied with batteries. Some of the supplied batteries were already broken upon delivery, they could not be loaded. Others were in the second or third time invite defective, and not reached even begin the nominated capacity (billi gesture China batteries, where 5.000mAH stands ...). That's why I bought this quality batteries that meet my expectations fully. I do not have appropriate instruments, but supposing that they reach the specified capacity. I use them in flashlights, and stamina with these batteries considerably longer than with standard low batteries. Who am enjoying electronic devices would, should invest in good rechargeable batteries. For example, in this.