The XTAR VC2SL Battery Charger is a versatile USB-C 2-bay charger designed for both 3.6/3.7V Li-ion and 1.2V Ni-MH batteries, including protected 21700 batteries. With an intuitive LCD display showing accurate battery status, it supports multiple charging currents (1x2A, 2x1A, 2×0.5A) and even offers a battery internal resistance test for enhanced battery management. Compact and safe, this charger doubles as a portable power bank and includes multiple protection features to ensure reliable, secure charging wherever you go.