@Bruce
Got the new batteries in yesterday. ATV ran like a champ for about 15-20 minutes. Now it shuts down after about 3 seconds of power. We were grilling out so I didn't have time to troubleshoot, however I have some thoughts.
Either the controllers protection circuits are protecting it from something, OR, the battery just died, and the internal BMS systems are keeping it from overly discharging. I haven't ran a voltmeter across the leads yet, or anything else. I also didn't charge the batteries before letting the little one loose to ride it, so I'm thinking they might just need a charge. Do LiFePO4 batteries behave this way? Feels like full power, then nothing. Like, not even enough to turn on the indicator LED's. Think I just need to put a charge on them?
Speaking of chargers. The new charger doesn't fit the old plug. SO, I had to move the old plug to the new charger. Not terribly difficult, I found positive and negative off the old charger, and the new charger only uses 2/3 of the pins, so I figure it works the same way. Stripped/soldered/heatshrank the leads, but haven't plugged it in yet. Anything I need to be on the lookout for there? I was initially worried about power draw across the wires, but the old plug had larger conductors than the new plug. Old charger did 24V at 1.5A, new charger does 29.4V at 2A. Slight increase in wattage, but again, the old plug had larger conductors so I'm not terribly worried about it. Anything else I should be on the lookout for here?
Thanks in advance for the help!
Edit here's a couple pics.
New Charger on the left:
New plug on the left:
New plug with outer shell removed.
Best I can tell this
should work when I plug it in. Just didn't have time to troubleshoot last night.