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Midland Helicopters . HeliProz . ZoomsHobbies

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e-Electric Batteries & Chargers > Lipo problem - is my battery messed up?
 
 
maller
Veteran
Location: PA

I've been using this one lipo for a while now, never any issues with it.

I'm not sure what happened, but I went to balance this lipo (Thunder Power 2070 mAh/11.1v, 3 cell) with my Thunuder Power balancer. When I plugged it in, it started beeping constantly, without stopping. No pattern to the beeps, just steady until I unplugged it. The battery was pretty warm right after a flight. I think this is an over-voltage warning. Not sure why, or how.

After letting it sit for a while, and forgetting about it, it now seems "normal." When I plug it in to the balancer, I get the yellow status light and the red lights to blink for 5 seconds. According to the instructions, that means I can charge it up.

Is it alright? I'm not sure why it started beeping like crazy originally. I want to make sure it's OK before I try to do anything with it.

No crashes on it. No puffing.

Thanks.



09-18-2008 07:44 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

I don't know what happened with the charger but its a good thing. You should never charge a hot batt, let them cool down below air temp.
09-18-2008 08:29 PM
 
 
maller
Veteran
Location: PA

Acutally, I didn't try to charge it. I just hooked it up to the balancer.

Think I'm OK to charge it?



09-18-2008 08:35 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

Go ahead and charge it, you charger should let you know if something is wrong.
09-18-2008 08:44 PM
 
 
"Cam"
Veteran
Location: UK

It may have been that one of your cells was under-voltage after flight, and the beeps were and under-voltage warning.

The voltage recovers a bit after letting the battery rest for a while.

DSX9
Custom eRaptor 700
09-19-2008 05:41 AM
 
 
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HeliHobby . Ron’s HeliProz South . Century Helicopter

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e-Electric Batteries & Chargers > Lipo problem - is my battery messed up?
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