Please don't do this, when rechargable lithium batteries are "discharged", they are not discharged fully, doing so would damage the battery. Charging circuits h

Please don't do this, when rechargable lithium batteries are "discharged", they are not discharged fully, doing so would damage the battery. Charging circuits have a "cutoff" voltage where they report the battery to be empty, but there is still plenty of stored energy in the cells.