I’m looking to build a 10s battery pack out of nokia bp-4l cellphone batteries. I’ve got about 400 of these batteries, all brand new, albeit a bit old. they are 1500mah each. http://www.cpkb.org/wiki/Nokia_BP-4L_battery
How many would I have to stack in parallel to power four 500W hub motors? Would 10s3p enough or should I go with 10s6p? And what should I be looking at in regards to battery protection/balancing/overcharge/overdischarge?