The Nitecore NL2150HPR 21700 battery is a high performance cell with a maximum capacity of 5000mAh, a 15A continuous discharge current and a USB-C charging port to remove the need for an external charger. Please note, a charging cable is not included. Safety is paramount to Nitecore and as with all their batteries, the NL2150HPR cell has a range of internal features to keep you and your devices as safe as possible. The 21700 battery has an innovative anode design with high temperature resistance, built-in PTC to inhibit high current surges, pressure relief valve which activates in the event of a rapid temperature increase and a microporous barries that protects the delicate internal components. Externally, the cell is equipped with nickel-plated stainless steel protectors at both ends and is coated with a durable metallic film to guard against abrasion.