Thanks, MRPink <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> . As for KENKEN, all you need is a good charger, perhaps a voltmeter to periodically verify your ending voltages (no more than 4.2V). Pick up the Pila IBC, or two for safe and reliable charging of 18650, 17670 and 18650 cells. Hundreds of charges is correct!