16340 Rechargeable Battery 3.7V 2800mah High Capacity for Flashlight 240313 (4 Pack)

I tested all my batteries in a Fenix HM50R headlamp and they all worked. I have not tested length of battery life, but they seem solid so far. One battery would not charge and the customer service was great. Sent out a replace immediately and the batteries worked!

One of the four batteries purchased would not charge showing lack of quality control. The four were sealed in plastic so assume factory lack of controls or it was repackaged defects.

Worth every penny

Look ok haven’t used yet

The batteries arrived quickly and as expected. No problem at all. However it is to soon to comment on the quality of the product.

Had to repair a mini Dremel I had. It's holding up works great

Update: The batteries don't seem to discharge at a high enough rate for my flashlights brightest mode to function. Steer clear if you are using this for a real flash light.These batteries are probably between 450 and 500mah. Which is acceptable for the price but if you thought you were going to upgrade your previous battery life 6-fold, you will be disappointed.If you are looking for quality, I'd still recommend hunting down an AceBeam brand battery.

I ordered the correct style number, but these will not recharge in my flashlight, they must be removed and charged in a separate charger. A real pain! I have to carry spare batteries around in stead of being able to just place the flashlight on its recharging stand.