Maybe somewhat on topic - what size of battery should you use as a regenerative load bank. I have a 4s 4200 LIFE battery that I would consider doing this with for an X6. Mainly to cycle 4200 to 4600 2S batteries. Thinking I would start with a freshly charged 4s and at least cycle a battery two times before a heat safely. I would think a lead acid battery wouldn't or it would need to be a big truck battery to do it. LIPO/LIFE I would think you would want it to be at least twice the watt-hour if not alittle more?