Faulty Trakpower? - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-12-2009, 09:01 PM   #1
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Hey everyone, (if this is in the wrong thread please move it) I bought my trakpower not to long ago to finish my 2wd buggy, chraged it up for the first time before running it was fine,

after driving it down I wasnt too sure that my lvc kicked in. Im using a 2007spec Lrp sphere esc. Now when i read the mode for lipo programming it said that profile one was for nimh and lipos?

so i left it at that,

After i ran i down i unpluged it when i thought the lvc kicked in, so when i went to go and charge it for the second time, something was oddly strange.

When i started to charge it, with my duratrax ice(and Maxamps method balancer) Using the proper harness, the Voltage read at 6.4V OK sounds fine but as it charged the voltage was increasing fairly quickly, before it hit 3.9AMP i was at 8.4V already at CC-CV mode(all happened in about 20 seconds) So it started to maintain the 8.4V and the amperage never reached 4.9Amps(1c). Now im stumbled becuase it starts to deacrese in amperage.

I gave it to around half to 75% charge (wich took a while) and drove it again. This time the lvc kicked in but, when i pluged it in it was at 5.998V! not good....
(or might be fine)?
Now im confused and a little peeved... ANY ANY information, or diagnoses of what the problem may be..
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Old 06-15-2009, 07:13 AM   #2
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For a 2S LiPo, 5.998V isn't that bad. Isn't great, but really could be worse. You should be fine to charge it again. Did you check each cell before you charged it the first time?

Hard to say if it's the charger or the balancer giving you an issue or the battery itself.

Are you charging through the balance taps or the main charge lead with only the balancer connected to the balance taps?

If you have a multimeter, check the voltage on both cells individually through the tap leads. Is there a big variance? Maybe your balancer was just doing it's thing and the pack was out of balance. That could certainly cause the charger to slow down. You might have a weak cell, just keep an eye on it. Measure both cells with a multimeter after each run.
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