If on assembly of new packs and some cells are higher #'s would you want to put the higher #'s on the end's of pack or in the center? or does it really matter? All top cells Just wanting best configuration. Thanks Paul

It doesnt matter.. after the pack is assebled, it works as one..

I was trying to figure out. since the end cells take more of a beating from soldering wires on and off. If there really would be advantage putting slight higher cells on the ends.

Well, once you decide which way the current flows, put the lower resistance cells at the END of the pack you feel the current flows toward. Personally I believe current flows pos to neg so I always put the lower res cells toward the neg wire. There are different theorys on current flow direction, but I've always felt putting a 2.0 res cell as the last cell in the pack effectively limits all the cells before it to 2.0 resistance. Just think of wiring different value resistors in series. In a series circuit this is a fact. A 1.7 ohm cell pumping current into a 2.0 ohm cell could potentally cause excess heat buildup and premature cell failure. Thats my theory and I'm sticking to it. As far as voltage is concernred it makes no difference they act as one. Possible at these res levels it makes no difference at all....

Thanks for the input.

Week Cells To Positive

Is anyones response actual proof, or just theory,.. because i have had cells re matched , or i have taken packs apart to put on new shrink wrap or whatever... and the numbers did not change one bit after the rebuild.. and i know they were NOT rebuilt in the same order..

Well, once you decide which way the current flows, put the lower resistance cells at the END of the pack you feel the current flows toward. Personally I believe current flows pos to neg so I always put the lower res cells toward the neg wire. There are different theorys on current flow direction, but I've always felt putting a 2.0 res cell as the last cell in the pack effectively limits all the cells before it to 2.0 resistance. Just think of wiring different value resistors in series. In a series circuit this is a fact. A 1.7 ohm cell pumping current into a 2.0 ohm cell could potentally cause excess heat buildup and premature cell failure. Thats my theory and I'm sticking to it. As far as voltage is concernred it makes no difference they act as one. Possible at these res levels it makes no difference at all....

By all means stick to your theory if you think it works, but I have to say you are incorrect. First off the current from a regular battery in a regular DC circuit flows from negative to positive. This isn't a theory it is just a fact. Things are of course different in an AC circuit and with different types of cells, but that is not what we are discussing here.

Also, from the standpoint you are coming from it makes no difference what order the cells are assembled in. I doubt you'll believe me but these are honest to goodness facts not theories.

Now as for what the person who started this thread was talking about. His idea about the outer cells seeing more heat from soldering is a valid one. I don't think that a cell with higher numbers is really more heat resistant though, also if you are soldering properly the cell should not see too much heat.

most matched packs have all cells within .001 of a volt. I really doubt it matters where you put that 1 thousandths of a volt.

The current through a series circuit (which is what we have here) is the same. One cell will not put out 10 amps while another is putting out 12 amps... it just is not possible. If anything, higher IR cells should go on the outisdes because, in theory, they will get hotter (higher resistance) and putting them on the outside of the pack will allow more cool air to flow around them.

Thanks. Got the info i was looking for.

I'll buy that Hank, after a bit of thinking I may try your method.