... -grade polymer lithium-ion battery,with dual functions of both backup battery and charger,you can be easy and convenient to ... carry "i-energy" and charge your mobile digital devices at anytime, anywhere On The Go (OTG).Products features: Battery ... ,Nokia x 1,SonyEricssonx1,Samsung x1, Motorolax1) User manual Other devices connectors and wall adapter are optional according to the clients ...