cordless USB charger

[JHW]

obsolete ryobi charger, was for the ni-cad batteries. Rip out the guts, install a couple USB power supplies. Charge devices anywhere.

 

[pigpenracing]

So you going to pack that big ass thing around with you??? I bought one of these a few years back and everyone in the family loves it.
http://www.mophie.com/shop/powerstation-pro-smartphones-tablets

 

[mkosmo]

I have a small 20AH battery pack I keep in my flight bag or bring it required. Much smaller and fairly cheap on amazon.

 

[JHW]

So you going to pack that big ass thing around with you??? I bought one of these a few years back and everyone in the family loves it.
http://www.mophie.com/shop/powerstation-pro-smartphones-tablets

I already pack these batteries around with me to power my tools. My cost was $5

 

[Shepherd]

I built my own using a $20.00 4400 mah LiPo from the hobby shop and some Radio Shack components.

 

[Shawn]

Dewalt makes one of those commercially: