PROMATE Bolt-10 is the best combination of price, quality and technical characteristics. Always ready to help when it comes to charging your gadgets. - Li-Ion 10,000 mAh batteryThis capacity is enough for 3 charges of a “standard” phone or 2 charges of a tablet. The power bank itself is charged in 5 hours. - Compact sizeThe Bolt-10's body is no larger than a five-inch smartphone, maybe a little thicker, but easily fits in your hand. - 2 devices at the same timeCharge via 2 USB ports at a total power of up to 10W (5V, 2A). - Automatic voltage regulationThe power bank will automatically select the optimal and safe output voltage in accordance with the connected device. The Bolt-10 battery is protected from critically high and low charge levels, and devices connected to the power bank from overvoltage, short circuit, overheating and overcharging.