[NSRCA-discussion] How bad is it?

[John Gayer]

John

If they are truly at zero your Cellpro should refuse to charge them.You 
can probably recover the packs by putting them on a wall-wart for 15 
minutes to bring them up from zero and then put them back on the 
Cellpro. Of course you want to do this outside on a concrete slab with 
no flammables in sight.
I've done this with 2s and 3s packs for small electrics. I have also 
done it for the redundant packs of a pattern airplane but afterwards I 
always matched up a recovered pack with a  fresh pack. So far I have had 
zero problems with the recovered packs for either reliability or capacity.
I also use Ed's system with two switches and use them to ensure that 
both packs are functional for each flight. Also I always remove the 
packs from the airplane after the flying session as part of the teardown 
process. You are going to remove them for charging anyway so remove them 
at the field and avoid the possibility of hitting a switch while putting 
the plane in the car.

John

On 8/20/2010 6:18 AM, Stuart Chale wrote:
> You can try to charge them and see if they come back up to voltage.  
> Then watch them carefully.  I think most of us would recommend just 
> tossing them and buying 2 new ones.  How much is 2 2 cell 480 mah 
> packs compared to the cost of a new airplane?
> Stuart C.
>
> On 8/20/2010 8:11 AM, John Konneker wrote:
>> As some of you know we recently moved.
>> I knew it was coming back in the Spring and haven't flown since April.
>> I decided to go out and make a couple flights this morning so last 
>> evening
>> I checked everything out and charged my motor batteries.
>> Thing is I forgot to turn my Rx off and drained both my 2s 480mah 
>> LiPo packs.
>> I fly Ed Alt's redundant regulator system.
>> I'm now charging them on my CellPro 4s charger.
>> They showed fuel level 0% when I started.
>> What should I do?
>> Junk both packs?
>> Thanks!
>> JLK
>>
>>
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