looks like once again, i have jumped to conclusions and it now looks like i owe Mr Ping another apology.....
i think the problem is another equally unlikely cause. something is wrong with my cycle lumenator.
tonight the BMS quit with only 4.8AH used. i was like WTF ???
then when i reset the BMS, it would light up the cycle analyst for a few seconds then immediately fade awaw to just the green
screen, no text. i did this several times, same result. i then turned off the lumenator and everything returned to normal.
i had full motive power again. rode home at full throttle around 40km/h, the BMS didn't quit once !
once i got home, resting voltage on the ping was 52.1V. at a complete stop, i turned the lumenator back on.
guess what happened next ?
power off !
the BMS quit again with the same symptoms as before.
seems there is some kind of short or other large power drain in the lumenator causing the BMS to trip.
ill send Justin an email and ask if they have ever seen this behavior before. it's not under warranty anymore.
so as i have already pulled the trigger on the Lipo's, i will now ride the ping till the weekend to cut off
(haven't done that for a full 15A before) if i confirm that it is ok, ill try selling it locally cheap.
that will pay for a second pair of the zippy's.
if it is ok after-all, ill be asking only around $250 for the battery and 5A charger.