dodocool MFi Certified Ultra Thin 2500mAh Portable Charger Backup External Battery Pack Power Bank with Built-in Micro USB Cable and Lightning Adapter for iPhone 7 Plus/7 and More Smartphones Black

Features
Premium 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, over-charging, over-discharging, over-voltage, over-current and over-heating 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.