3.7volt 1￵8￵6￵5￵0 Rechargeable Batter￵y 9900mAh 3.7 Volt Flat top 18650 Batter￵y for flashlights and headlamp, etc (8pcs-3.7v)

Same number as the batter in my product but found out the battery in my product is proprietary.

Long lasting with a full charge

Manufacturer purposely added an extra 9 in the capacity to trick you into buying this garbage battery. Capacity is more like 900 mah rather than 9900. I fully charged this battery and then tested it on a short led strip. Did not even last a half hour powering the strip. Did it a couple of times and same results. Don't even waste time on this battery. If only I can give this 0 stars.

They're doing the job at a much better price. The charge isn't holding as long as the more expensive batteries, but I can live with that.

Excellent product. still using them today

My hope was to replace a bad battery in a Dewalt battery pack. But when I opened it up, I discovered battery was welded in place, and would have to break plastic housing. The batteries supplied by the vendor came almost next day in a very secure package, and were completely charged, and ready to go.

This works so much better than what came in my flashlight. Will definitely be purchasing again if the need arises.

Does not hold charge well. Short usage life.