Kuman Lithium Battery Pack Expansion Board Power Supply with Switch + Micro USB Cable for Raspberry Pi 3 Model B, Pi 2 Model B & Pi 1 Model B+ A+ A KY68 (Battery Pack) Specially designed for Raspberry pi,which makes Raspberry pi work up to 9 hours. Double USB output. One is for Raspberry pi, the other can be connected with LCD screen. Easy to install, you can use provided fastening standoffs, screws and nuts to fasten your Raspberry pi board. It comes with 17cm micro USB cable. Battery capacity: 3800mAH Maximum; Output current: 1.8A