2 Packs 18650 Rechargeable Battery 3.7V 3500mAh 18650 Flat Top Battery for Headlights etc

I'm not an expert, I bought them to replace batteries in my Hair Trimmer. So far they work great.

Great Batteries

Excellent

Good battery life.

Does exactly what it says. Very fast delivery

Just like apparently every 18650 battery sold on Amazon these are falsely advertised as being a different capacity than they actually are. Many other vendors will advertise capacities that are not possible like 9900mAh, but these appeared to be real as they advertised 3500mAh which is pretty much the max you can get out of 18650s other than some really expensive newer ones that go up to 3600mAh. When tested, these came in well short of the advertised capacity. One tested at 2136mAh and the other tested at 1782mAh. Combined that is barely over what one of them was advertised to be. They don't last long and don't hold a charge. Don't waste your time buying these or any other 18650 batteries on Amazon. Do yourself a favor and go buy them at a hobby shop or vape shop where they have real ones at the advertised capacity.

This is my 2nd order for these rechargeable batteries. At this time I have not used them, however I am currently using the second battery from my original purchase. The batteries work well and last along time between charging.

Great batteries.The original in hair clippers for my dog would die too quickly.Each one of these lasts 3 times as long.