d21lewis on 22 February 2017
I just bought this:
Portable Chargers RAVPower 22000mAh Power Banks 5.8A Output 3-Port Battery Pack (2.4A Input, Triple iSmart 2.0 USB Ports, Li-polymer Battery) External Battery Bank For Smartphones Tablets more- Black https://www.amazon.com/dp/B01G1XH46M/ref=cm_sw_r_cp_apa_mELRybD6QYSAK
So I'm not worried about battery life.
