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-   -   lipo cell balance ? (https://www.rctech.net/forum/radio-electronics/784263-lipo-cell-balance.html)

liquid g 01-08-2014 11:19 AM

lipo cell balance ?
 
i have 2 losi xcelorin shorty 3800 2s batteris that when i balance them it is showing the cells are off. is this a sign my batteries are going bad ?also the RES is showing higher then my other batteries. i have tried dischage and charging them and also storage mode still cells show about the same
http://i32.photobucket.com/albums/d4...pszctbnzez.jpg
http://i32.photobucket.com/albums/d4...ps8p4ibpf7.jpg
http://i32.photobucket.com/albums/d4...ps4emikjxe.jpg

theblitzkidd 01-08-2014 11:30 AM

I have a battery that did that 1 time and it stopped....its a hvr shorty...how old sre the batterys

liquid g 01-08-2014 11:43 AM


Originally Posted by theblitzkidd (Post 12886746)
I have a battery that did that 1 time and it stopped....its a hvr shorty...how old sre the batterys

a little over a year old

racer1812 01-08-2014 01:44 PM

I would say they're dying. They shouldn't be that far out of balance.

Age has much less to do with Lipo life than how you treat them does.

ThePanda 01-08-2014 02:24 PM

can you balance them? i had batteries that were more off than that (cuz i forgot it in the car, and so it sat there charged for a week or so). I balanced it, and it then never strayed out of balance again.

Dave H 01-08-2014 03:07 PM

Not familiar with how the resistance values from that charger compare to others, but at first glance a resistance value of 146mΩ is very high.

ReneT 01-08-2014 04:15 PM

The balance is really far of, but before you discard them check your charge/balance cables.
I once had a balance cable that had one of the connectors being pushed back a bit, making a bad connection. All of a sudden I had three packs go "bad", and some were still good.

Yosh70 01-08-2014 06:30 PM

It looks like the charger is displaying the total resistance, obviously not each individual cell.
Regardless, 146mΩ is very high. My yr old nanotechs show 1.9 - 2.2mΩ on each cell.
They say between 2 and 10mΩ per cell is good..

liquid g 01-08-2014 07:28 PM

Ok thanks guys I had been using them in my 17.5 buggy and seen a big difference in punch over my reedy shortys.guess ill start using these for my scx-10 crawler.

theblitzkidd 01-09-2014 05:47 AM


Originally Posted by liquid g (Post 12888254)
Ok thanks guys I had been using them in my 17.5 buggy and seen a big difference in punch over my reedy shortys.guess ill start using these for my scx-10 crawler.

Shortys in a crawler:o lol yeah sounds as if they may be dead :(

Johnnysplits 01-10-2014 06:19 AM


Originally Posted by Yosh70 (Post 12888033)
They say between 2 and 10mΩ per cell is good..

True. Once individual cells go over 20, it's pretty much done.

liquid g 01-10-2014 08:44 AM


Originally Posted by theblitzkidd (Post 12889304)
Shortys in a crawler:o lol yeah sounds as if they may be dead :(

Lol yea right now I run saddle packs on the side rails of my scx10 for lcg

theblitzkidd 01-10-2014 11:01 AM


Originally Posted by liquid g (Post 12893024)
Lol yea right now I run saddle packs on the side rails of my scx10 for lcg

Well saddles seem legit, they are the same weight as a stick pack:p


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