... camera, PDA, MP3 player, MP4 player, videogame player) battery charger. Such an absolutely useful product in such a wonderfullly ... as mobile phone / keychain fob SpecificationsPrimary Function: Emergency cellphone battery chargerDevices Supported: MP3 player, MP4 player, Digital Camera, PDA ... , Hand-held Video GamesPower: Built-in Li-ionBattery Life: 15-30 minutes talk time, 4-8 ...