OLIGHT ORB-186P26 2600mAh Protected Button Top Rechargeable 18650 Battery M22 M20S M18 M20X LED Flashlights and more High performance High Capacity 2600mAh 18650 Rechargeable Battery Built-in protective circuit - overcharge, undercharge, over discharge protection Superior cycle life performance - you can recharge 500 cycles without deteriorating performance Trip overheat protection - extreme safe Include 1x Olight 2600mAh 18650 rechargeable battery & a bright Lumentac Keychain Light