Battery charging error tp610

[jj2003]

I have 2 venom 3s 5000mah lipo's. Have never had an issue up till now. Forgot and left the batteries connected for a few days and battery voltage has dropped to 2.7 on one and 3.2 on another. Now when attempting to charge I get a voltage error or wrong polarity. I have checked the connections several times and all are correct. Any ideas as to whats wrong? Did I let the batteries drop to far down in voltage and how can I corect?

[Insaniac]

Sounds like you let the cell voltage to drop too low. When that happens you usually ruin the pack.

[jj2003]

Any remedies? or just toss em and count it as a lesson learned?

[785boats]

Your charger is reading a low voltage on the cells & won't start the charge.
Since the drain was at such a low rate the packs shouldn't be damaged. I've brought back packs from less than 1.0V/cell before.
Set your charger to NiMh at 1 amp & charge the pack for about 5 minutes or until the cell voltages are all above 3.1V. When the voltages are up to 3.1V/ cell (9.3V total) terminate the charge & then charge normally on the Lipo charger. The Lipo program will sense the voltages above the 3.0V threshold & start the charge.
Make sure you don't leave the packs unattended during this process.
Cheers.
Paul.