| I recently experienced a problem with a set of LiPos whereby the | batteries became discharged to a very low level (one to 3.4V and one | to 0.1V). I was in a rush when leaving for the weekend and simply | removed the batteries from my vehicle by disconnecting the Discharge | Protection Modules from the power distribution board. I did not remove | the DPMs from the batteries however.
You mean this --
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? If so, docs are here --
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... and they do say to remove power by disconnection the DPM from the battery, several times.
| Is it really possible that the DPMs draw enough current with no load | attached to drain a set of 85% charged (22.2V) batteries to such a low | level in the space of 48 hours? Has anybody else experienced this?
Well, let's do the math. 85% of 3200 mAh, divided by 48 hours = 57 mA. Could this device use 57 mA of current? I don't know -- that seems high, but not impossible. You might want to contact FMA and ask. You could also measure it yourself pretty easily.
Actually, the instructions say that the current draw is 10 mA, last page. So if this is correct, and your battery really had 2700 mAh of capacity left, this should not have trained the battery completely in
48 hours. Was there anything else connected? Is it possible that the way things were set up that you also had your RX and servos connected and drawing power?
Either way, don't ask us. Ask FMA. I'm guessing that few people have actually used this specific device, but you might find more people who have on rcgroups.
| The batteries in question are BalancePro Compatible 22.2V nominal with | a 3200mAh rating.
Ouch. Expensive mistake.