1. Compact patented design. 2. Aluminum Alloy shell, nice texture. 3. It has all necessary protection, including short circuit, overcharge and temperature protection, etc. 4.The sleep and wake-up function of the power itself, low seif-consumption. 5. Simple and elegant appearance 6. long battery Life, cycle of charge/discharge>=500 times 7. CE/FCC/ROHS/PSE certified.