FeaturesPremium Components Rated at 2500mAh, this Ultra Thin Power Bank adopts premium lithium polymer battery which is more stable and safe than Li-ion battery. Built-in Micro-USB Cable Lightning Adapter Both the built-in Micro-USB cable and built-in Apple MFi certified Lightning adapter are neatly tucked away, ready to use at any situation. Fast Charging Speed Support rapid charging (up to 1 Amp current) for popular smartphones or mobile devices with a micro-USB port or Lightning port. Safe and Reliable Short-circuit, overcharging, over-discharging, over voltage, over current and overheating protection keeps you and your devices safe. Ultra Thin Lightweight Compact Ultra-thin at only 8mm and lightweight at less than 65g, you can easily slide the compact battery pack into your bag, pocket or wallet and take it wherever you go. LED Power Indicator The LED power indicator light lets you know power consumption, so you can be sure your battery won't run out when you're on the go.