What would you do?

[George16]

I don't think you're responsible for it.

[lincpimp]

Lipos swell for 2 reasons, over charging and discharging past their rated limits.

So he either over charged the pack, or shorted it. I doubt the goat can pull enough to over discharge the packs during use.

My guess is that the esc crapped out and took the pack with it, he should have unplugged it quickly and saved the lipo.

Or they charged the pack without a balancer and really overcharged one cell.

Either way it is his fault, I would tell him to read up on lipos before he kills the other one. I have sold alot of lipos, and I figure that people buying them know how to use them. If not then they should not buy it. Kinda like blaming Jack Daniels cause you got drunk... really your own fault.

[sikeston34m]

OK, here's more information:

http://www.teamnovak.com/products/es...oat/index.html

GOAT BRUSHLESS/BRUSH CRAWLER ESC SPECIFICATIONS
Forward/Reverse: Forward, Drag Brake, Reverse
Input Voltage: 4-7 Ni-Cd/Ni-MH cells (1.2V/cell) or 2S Li-Po cells
On-Resistance: 0.0012 ohms* (brushless per phase); 0.0012 ohms* (brushed)
Footprint: 1.18” x 1.54” (30 x 39 mm)
Weight(w/o wires): 1.49 oz. (42.2 g)
Rated & Braking Current: 120 amps* (brushless per phase); 120 amps* (brushed)
Power Wires: 14-Gauge
BEC: 6.0 volt/5.0 amp
Motor Limit: 18.5-turn (brushless); 27-turn stock motor (brushed mode)
Discrete Steps: 512 Forward; 512 Reverse
Battery/Motor Plug: Tamiya (battery); None (motor)
Voltage Cut-off: 6.25 volts (when Li-Poly Cutoff Circuitry is enabled)

So this ESC does have a LVC IF it was enabled.

Here's an exerpt from Wikipedia on charging Nimh. (Simply to show the voltage tolerance of this ESC)

http://en.wikipedia.org/wiki/Nickel_...ydride_battery

Charging

NiMH Charge curve - The charging voltage is in the range of 1.4–1.6 V/cell. A fully charged cell measures 1.35–1.4 V (unloaded), and supplies a nominal average 1.2 V/cell during discharge, down to about 1.0–1.1 V/cell (further discharge may cause permanent damage). In general, a constant-voltage charging method cannot be used for automatic charging. When fast-charging, it is advisable to charge the NiMH cells with a smart battery charger to avoid overcharging, which can damage cells and cause dangerous conditions.

So the Novak Goat ESC works with 7 cell Nimh packs. A fully charged 7 cell pack will be at 9.8 volts when you first pull it off the charger. Plenty of tolerance for a 2S Lipo pack.

The Pack in question probably encountered a HUGE Amp load (dead short) OR No Low Voltage Cutout was used. If No LVC was used, then it was ran until completely dead.

[lincpimp]

I will bet that if we could see the esc it has terrible soldering and either the battery or motor leads shorted, and the moron in question left the pack plugged in. Or maybe he just left it plugged in overnight, but that would not cause the esc to go POOF...

Either way I hope he learned his lesson, cause it was expensive