1965 Fenix 18650 Rechargeable Batteries MSRP: Was: Now: $12.45 - $23.45 Fenix 18650 Rechargeable batteries are the best power option for all your Fenix Flashlights. Fenix-store.com offers a few different options in 18650 batteries ranging from 2600mAH's all the way to 3500maH's. Batteries with a higher mAH for example the... Choose Options