audio tool modified back cover

the purpose of this modification is to replace the back cover of popular audio based tool’s to have a USB 3.0 charging port as well as a longer battery life from a 2200mah battery.  also included is the components & instructions to extend auto shut off time’s. (auto shut off extended time does require soldering) replacement of the cover does not. with about 10-15 minute time via 8 screws your tool will have recharging abilities.

*rev letter & date code is need to match unit used with