Sony has released a couple of battery-packs that can charge two devices simultaneously through USB ports. The CP-F1L has 3,500mAh batteries with 1.5 ampere output; whereas the CP-F2L has twice the capacity at 7,000mAh. The pack itself can be charged by directly plugging into a power socket, or through USB. While being recharged using an AC adaptor, these packs can also charge other devices simultaneously. Both models have Li-ion polymer batteries that are rated to be recharged 500 times. The USB Portable Power Supply CP-F1L and CP-F2L is priced at Rs. 3,000 and Rs.5,500, respectively.