Pride Jazzy 1103 Ultra: Bought used and came with new batteries. Worked fine until a week or so ago. Then died and couldn't be recharged (on-board charger). The seller kindly sent an external

You could try a different power cord for the on-board charger. I know it sounds like a stretch, but every on-board charger I've seen uses a standard computer power cord. Those aren't designed for the several-times-a-day plug-unplug cycles power chair users can put them through. I've seen this fix broken on-board chargers a couple of times.

A cheep fix is the charger I am showing you from Advance auto it will bolt into stock location and bolt to battery post you will need to make a jumper wire to send batt. voltage to joy stick controller well worth doing the modification to save big $$$$.