POWAAA

https://www.amazon.com/Schumacher-XP2260-Instant-Portable-Starter/dp/B004EIAADG

worked great last year, 120 bucks at Lowes

and a USB charging station to go with

https://www.amazon.com/Desktop-Charging-PowerSmart-Technology-Compatible/dp/B011LSGMT2/ref=sr_1_fkmr0_1?s=electronics&ie=UTF8&qid=1486793295&sr=1-1-fkmr0&keywords=anear+usb+charger+strip