Nitecore NL2150RX 5000mAh USB-C Rechargeable 21700 Battery Black/Yellow. This powerful battery offers high capacity and superior energy density compared to previous similar batteries. You have two options for charging the NL2150RX: You can either use its built-in USB-C port or use a Nitecore charger such as UMS4 UMS2 Ci4 or Ci2 etc. Moreover the NL2150RX can also double as an emergency power bank allowing you to charge other devices such as smartphones smart watches etc. through its two-way USB-C Port.The Nitecore NL2150RX comes with all of the safety features quality engineering and more that has made Nitecore a trusted brand for rechargeable Li-ion batteries. The NL2150RX features a built-in pressure relief valve high temperature resistant design and built-in safeguards to prevent surges. This protects devices from overcharging over-discharging as well as short-circuits. The NL2150RX is built with premium materials such as nickel-plated stainless steel connectors for impact resistance good conductivity and resistance against oxidation. Specifications for Nitecore NL2150RX 5000mAh USB-C Rechargeable 21700 Battery: Manufacturer: Nitecore Color: Black/Yellow Battery Capacity: 5000 mAh Length: 3.10 in Weight: 2.63 oz 0.16 lb Battery Type: 21700 Rechargeable Lithium-Ion Battery Lithium Ion Rechargeable Features of Nitecore NL2150RX 5000mAh USB-C Rechargeable 21700 Battery Built-in USB-C charging port Can be used as an emergency power bank Built-in pressure relief valve Microporous barrier for heat dissipation Built-in PTC for surge protection Nickel-plated stainless steel cathode and anode Package Contents: Nitecore NL2150RX 5000mAh USB-C Rechargeable 21700 Battery Nitecore 6952506495535: NL2150RX 5000mAh USB-C Rechargeable 21700 Battery Black/Yellow