Green House has just added a new battery-operated mobile battery charger to its product page, the GH-BTB34A. Powered by 4x AA alkaline batteries (included), this travel-friendly battery charger has one USB output port, an LED lamp for checking the power status and comes with a micro-USB cable (30cm) for charging your smartphone. The GH-BTB34A will begin shipping from mid-August for 1,280 Yen (about $13). [Product Page]