... ion battery chargerInput100-240AC 50/60HZ(World use)Input plugsEU, US, UK, Australia, Japan, South Korea, CN(customized)Output4.2V/8.4V/12 ... .6V/16.8V/21V/25.2V/29.4V/33.6V/42V/46.2V50.4V/54.6V/84V ... , Phone, MP3/MP4, Boat Device, Rechargeable Bus and so on. 8.4v 3a li-ion charger charger for lithium battery pack