I don't know a ton about batteries but I know these have been safe, reliable, long lasting and powerful. Don't trust any battery with a higher rated capacity then exists. 5000mah should instead say beware inferior quality and may destroy whatever you put it. These are not a gamble like some other brands are. I trust them alot and the U.S. military does too
I did a LOT of research before buying these....you can't beat a good brand.
Best to stay away from the cheaper batteries with the much higher mah rating.