I bought these figuring they would be strong and last for some pocket LED mini flashlights. The problem is they maybe too strong...crazy...after about 4 minutes I realized the flashlights became very hot. Too the touch hot like ouch...this could be a hazard. The only warning on the packing is to insert the batteries correctly. This was not the case with me. I tested a new pack of this product with 3 mini LED flashlights which use standard AAA's. The only time I'd notice this heat effect is when you overcharge a rechargeable lithium. Consumers...becareful. However they seem to work well in devices that are not constantly running....such as a remote control or camera.