Do you have a lot number or sales date range on those bad batteries?
I have installed mine, but not yet hooked it up (since I'm running on the main battery only, haven't started the engine yet, so no alternator to feed the bus/charge the battery)...thus, I don't know if there is or will be an issue with the battery yet.
If you had serial numbers or lot numbers or something else to identify a bad battery *before* it gets connected and I try to go flying with it, that'd be grand...
Steve
It's a Li-Ion battery pack, nothing too magical about it, though it is a custom unit. There is of course a safety circuit protecting it, and SkyView manages the charge and won't charge things that don't look like a SkyView battery. We don't publish the detailed specs you would need to recreate one, though.