Don’t waste energy !

Sometimes you need to fully discharge your tablet’s battery, ‘cause you must drain all the power to obtain an Hardware Reset that can make your tablet able to restart with the upgrade process. So, I have used this simple technique to speed-up the process and to NOT WASTE energy !
I simply attached a USB battery charger to the tablet’s expander board, so while the tablet’s battery fastly discharges, my AA Ni-Mh charges 😉