[NSRCA-discussion] TP 53005SPL2

[Ihncheol Park]

By the way, my distributor had them for over a month and about to go out of
stock.
Where did you put them on backorder?  I know at least 5 different wholesale
companies selling TP beside the TP itself.  TP does have them in stock.

Ihncheol

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bill's Email
Sent: Friday, June 05, 2009 6:44 PM
To: chad at f3acanada.org; General pattern discussion
Subject: Re: [NSRCA-discussion] TP 53005SPL2

Yep, I was talking about a full 10S in the plane. Two 5S2P packs in 
series, did not make that very clear did I?? 10 cells per pack, 20 cells 
total on board.

I spoke with a pretty large reseller of TP products and he is the one 
who told me that TP is not warm and fuzzy on this pack. He said they 
have warranty concerns. Frankly I wish there was a separate balance tap 
for each of the 5S packs in each one. As it is you are balancing cells 
in parallel, not the best method.

The 2600 cells that they make these up from are very scarce right now 
and on backorder for TP. I've been waiting about a month for the two 
packs I just got.




Chad Northeast wrote:
> Bill
> That is not correct, there are only 10 cells in those packs, made of 
> 2600 PL2 cells.  Essentially two 5s 2600 packs in parallel.
>
> I have a hard time believing that TP will stop making this pack, they 
> have made far more complicated packs in the past.  These packs are 
> made to order which makes them usually not a stock item.  I will 
> confirm this with TP though.  They have been around for nearly a year 
> now (I am still flying the first two of 4 sets produced), so I don't 
> see why they would stop now.
>
> Chad
>
> Bill's Email wrote:
>>>
>>> ------------------------------------------------------------------------

>>>
>> It is in fact a 5S2P arrangement. Two 5S 2600 mAh packs in parallel 
>> plus two other packs in parallel and those two in series with each 
>> other.  A total of 4 5S packs in there. THis is why this pack 
>> performs so well under load. Each of the two parallel packs in each 
>> set only sees half the load and consequently it has less voltage drop 
>> under load.
>>
>> TP does not like making this arrangement and I understand that they 
>> may stop very soon.
>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
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>

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