Did I kill my battery?

ctbon

ctbon

Member
So I'm having a beautiful flight. I have my timer set to 8 mins which is usually fine though I don't usually fly until the timer goes off. I guess I pushed it a bit far because as I was bringing her back she starts heading very quickly towards the ground...not in freefall but faster than I was comfortable with (and rotating as well which was weird)...I figured I had drained the battery which I guess I had as the low batt alarm was going off when I went to check for damage (thankfully, none!)

When I got home I plugged in the battery to charge and it was at 0% so I thought I must have really drained it. Now when I try to charge it I get a battery output error at about 65%. I have tried 3 times with the same result.

I am admittedly very ignorant when it comes to the science of LiPo batteries but I want to learn.

Is the battery done now? Can I rely on it for short (4-5 mins.) flights or should I just stop using it altogether?
 

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AIRCONROB

Member
Hi mate, so when you say Can I rely on it for short (4-5 mins.) is that the times you've been getting before this happened? Also what setup are you running and battery size?
 

ctbon

ctbon

Member
I've been getting around 7-8 mins. no problem. Maybe I was flying a bit more aggressively. It didn't seem like it. Battery was charged to 96% when I took her out. It failed at around 7:45 mins.

Battery is a 6600mah 14.8v 28C 4 cell. It's a VoltOn formerly known as PolyQuest produced by Batterist formerly known as Prince :)

I'm running it on an MK controlled Okto 2 with 2827-35's pulling up a GH2 which with lens is about 650g.
 
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AIRCONROB

Member
I'm no expert, but I experienced where my Schulze charger would not accept one of my batterys a couple of times when i was running F5D because I drained the cells below the recomended voltage and on 3 cell battery I manage to drain it down to 8.3 volt which is not good for lipos, I thought I goosed it untill my mate told me to do this,
Put your lipo charger into Ni-Cd mode, without the ballance lead plug the power cables to your charger and watch the voltage go up just over 10 volts which should only take about 10-15 secounds, unplug and reset charger to lipo charge. Plug ballance lead on and battery main leads and it should start charging.
 


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AIRCONROB

Member
Just keep your eye on the battery when you do that, dont leave it on Ni-Cd for too long, like I said just get it over the initial 10 volts and happy days.
Just a thought aswell, none of the cells have swelled up have they? If they have then dont.
 



ctbon

ctbon

Member
well...not really...I am still able to charge up to 65% then I get the error...a quick living room hovering test is showing that:

a). The pack will last about 6 mins bringing the battery to 17% so I may still be able to use the pack flying normally for under 6 mins.

b). flying the okto in the living room makes my wife a bit nervous
 

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