[NSRCA-discussion] Dodged a Bullet Today!!!!

[Robert Mairs]

It says in the instructions that it displays what the charger "thinks" is 
the cell count.  If the 109 was ramping up the voltage, you've got a problem 
that you should keep your eye on. It doesn't lock final cell count until it 
switches to stage 2.  It is possible for the charger to select the wrong 
cell count at the extremes you list, that's why you have to confirm the cell 
count and wait for stage 2.  Plus your supposed to also start with the 
current at 0.  That's in bold underlined type.  Lipos don't need to be 
topped off, 3v resting you have a over discharged cell.

----- Original Message ----- 
From: "Grow Pattern" <pattern4u at comcast.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, March 22, 2006 11:36 AM
Subject: Re: [NSRCA-discussion] Dodged a Bullet Today!!!!


> Where is this VITAL advice in the battery or charger instructions???
>
> What still bothers me is:- If 3 fully charged cells = 12 V plus, and 4
> discharged cells = 12 V Plus, then how does the charger know which is 
> which?
>
> Eric.
>
> ----- Original Message ----- 
> From: "Dean Pappas" <d.pappas at kodeos.com>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Tuesday, March 21, 2006 11:50 PM
> Subject: Re: [NSRCA-discussion] Dodged a Bullet Today!!!!
>
>
>> Hey Evil,
>> I'd rather be lucky than good: any day!
>> And that's why you use a charger that looks at each tap, before charging,
>> in order to determine the number of cells. The same problem exists when
>> dis-charging packs. That's how I trashed one cell in one of my 5Ses.
>> Dean
>>
>> -----Original Message----- 
>> From: nsrca-discussion-bounces at lists.nsrca.org on behalf of Grow Pattern
>> Sent: Tue 3/21/2006 6:04 PM
>> To: NSRCA Mailing List
>> Cc:
>> Subject: [NSRCA-discussion] Dodged a Bullet Today!!!!
>>
>>
>>
>> http://www.rcuniverse.com/forum/m_4056141/anchors_4064428/mpage_1/key_/anchor/tm.htm#4064428See
>> picture on RCU.I had a bit of a set back today with my winter fun 40 
>> sized
>> glow to electricconversion. I had wanted to try the Thunderpower 4200
>> instead of the Tanic3600. I set off to the field with a borrowed
>> Thunderpower 4200 mAh pack. Iset the Astroflight 109 to 2 Amps. It ent to
>> stage 1 and was calibrating toa 3 cell pack and was well on its way to
>> charging the pack, or at least so Ithought . I have done this
>> topping-it-up many times before. I set it on a 2Amp charge rate.I never
>> made it to the field. I heard a light "Phuttt!" about ten minutesinto the
>> journey. I stopped the van and ran back to the back doors. Thebattery was
>> bloated and looking bad. I grabbed the Deans connectors andunplugged it.
>> Dangling it by the lead and as far away from my face aspossible I lowered
>> it to the curbside.I then personally backed up and was about to move my
>> van forward a bit . (Ihad just put 3!
>> 5 gallons in it!). Seemed like a good idea to get clear. Neverhad the
>> chance. The pack blew up in a ball of flame about a cubic yard insize and
>> proceeded to burn fiercely. I had grabbed the fire extinguisher 
>> butdecided
>> not to use it.The local police joined me for a while and seemed more
>> interested in theplanes in the back of the van than the charred remains. 
>> I
>> scraped all of thebits up to keep the country side pretty. Estimated that
>> the grass would growback soon, and went home.Fortunately I was able to 
>> get
>> it out of the van before it blew up intoflames etc.Long and the short of
>> it is. "Do not charge a fully charged battery with anautomatic
>> charger"Dodged a BIG bullet today.....Regards,Eric.P.S. If 3 fully 
>> charged
>> cells = 12 V plus, and 4 discharged cells = 12 Vplus, then how does the
>> charger know which is which?
>> _______________________________________________
>> NSRCA-discussion mailing list
>> NSRCA-discussion at lists.nsrca.org
>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
>>
>>
>
>
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