Fenix ARB-L16-1150P Rechargeable Battery

Was a little worried the protection circuit would make it too long for my light, but it fits snug and the 1150mAh capacity is noticeably better than my old cells. Three lights in one charge now instead of two.

Charges up my 16340 flashlights in about half the time my old cells took, and the 1150mAh capacity actually lasts through a full evening of use. The built-in protection circuit gives me peace of mind when I forget to swap batteries out.

The protection circuit built into the anode gives me real peace of mind—I’ve had cheaper 16340s swell up before, but this one stays cool and charges reliably every time I pop it in the slot. Capacity hits the advertised 1150mAh in my flashlight, and it’s been holding steady through dozens of cycles.