Meet the TRONTIUM Reactor: a universal battery with USB Power Delivery. What does that even mean? This is a standard through which devices with USB ports can request up to 20 volts and 5 amps. Of course, the Reactor works with regular devices too. This 290 watt-hour battery has 3 100 watt USB ports, capacitive touch sensor, and zero moving parts. It also has a 150 lumen LED ring that can be used as a light source.
The Reactor has Bluetooth, so it can pair with your smartphone. It is rugged and waterproof. It can charge your iPad 9 times. The battery is compatible with digital cameras and other gadgets. Not cheap but nice to have when you need an external battery source.