I have a pro4 that has worked seamlessly for about 10 months…until a mishap last weekend. I was charging the board on my workbench and accidentally knocked it off the bench…I caught the board before it hit the ground, but in doing so, the male end of the fast charger was yanked sideways in the female charge port and created BIG spark (not the normal spark when plugging in). It actually melted the male end of the fast charger.
Now the Pro4 will power on, but the battery % on the display will show 0%, or rapidly fluctuate from 0% to 100% back to 0% when plugging a charger in. I’ve opened the Pro4 up and see no visible signs of damage. Does it sound like the bms is damaged or did I likely damage the cells themselves?
Sorry for the long delay in response. Recently started my own business and life has been a bit crazy.
I actually have two batteries that need repair. One space cell pro4 that I already mentioned and another space cell (goes in the original Raptor). I think the bms is bad on the Pro4 and my guess is there are broken welds on the original space cell…it experiences rapid decline in output even after being fully charged, will frequently shut off the board when climbing moderate hills.
If I ship both to you, would you be willing to fix them? I will happily pay parts plus labor…maybe $50 bucks…but really whatever you think is reasonable.