... 4.Accept OEM Portable external battery Back up battery case power pack for Glaxy3 i9300 Features:1.material:Lithium-ion,2 ... ,6.use standby:2 days7.high quality,competitive price,8.unit weight:74.2G,package weight:142.4G (1) product performance ... system, the conversion rate of 90% or more 4 external power adapter, can be synchronized to charge your phone Compatibility, common ...