Overview: Bettery Charger Input:220V -10%, 50-60 Hz, Output:DC4.2V -0.05V, MAX 250MAAble to charge original mobile phone Li-ion Bettery Compatible with most Lithium-ion batteries produced by formal manufacturers. Light in weight & easy to carry with the keychain. Easy to operate, safe & fast to charge battery. Applicable to solar energy & mobile power USB (Universal Serial Bus) interface charge. Anode automatically converted circuit design. Package 1 × Super Mini USB (Universal Serial Bus) Universal Charger Keychain Specification: Dimensions: 70 X 26 X 30 mm Weight: