Another update: Still works fine besides the lousy ohm readings. I think the 510 connection may still be weak because between during a drag, it sometimes starts off weak and then jolts way up as if the voltage was cranked up another 30 wats, or vice-versa.
I came back here to ask though, how long does your device typically hold a charge for? I was expecting about two or three days from this device, but it seems that it lasts about 1 to 1.5 days on a full charge. Just wondering if that's an indicator the batteries are old.