... type, Battery: Rechargeable li-ion polymer battery (3.7 V/4,000 mAh) Expansion slots: SIM/SAM/Micro SD (TF) card ... alphanumeric keypadStandard Accessories4,000 mAh Li-ion battery, Usb cable, RS232 serial cable, Touch stylus, 4G microSD (TF) card, Hand strap, Carrying ...