Battery size question

[LUTNIT]

My R/C racing friend and I where going to make an order together from one site that makes custom battery packs but I dont know what the cell size is on the AUG packs (found here) to be able to place the order, any one know what size the cells are? I'm thinking 4/5A as they are too long for 2/3A but my friend said they may also be 2/3AAA. Getting better packs as the only AUG ones I an find are the Ni-CD ones made from Sanyo cells, not exactly top quality.

Note: Battery pack is for a P90 with buttstock extention, not an AUG...though I dont have the P90 or the extention yet, but soon...hopefully

[attack-beaver]

well i have a 8 cell large battery and when i was talking to ppl at battery shops they told me the size was a sub C if that helps at all.

[Amgoosen]

Those are SubC cells, the most common cells with a low enough internal resistance to power an AEG. Double and triple A cells will not work in an AEG unless you get specialty low resistance cells, and thats a pain in the ass.

[LUTNIT]

um...mini batteries use 2/3A cells, and the AN/PEQ2 battery packs often use some of the other A sized cells (4/5A, A, AA, etc.). The battery pack at my link above are most definitly not SubC's as they are far too tall if the diameter is the same as a SubC, or they are far too thin if the height is that of a SubC.

And the smaller cells used in mini packs and AN/PEQ2 are not specially selected in any way, I can order a battery pack using 2/3A from an R/C car store and they will power my AEG. As far as I know the only kind of special selection that goes on with battery packs is matched cells, and thats all about getting cells that have the voltage as close to each other as possible, so instead of just slapping all 1.2V cells together, they measure them to a finer scale and try to match them, like 1.254V.

[mcguyver]

Matching cells is really irrelevant as for airsoft use all battery packs are series configured cells. That means that voltage is additive (volts/cell x # of cells), but current is the rated capacity of any one of the cells (not additive).

The AUG will hold a 9.6v battery made with "AA" cells and you can get cells from GP that are 2600mah. So you could fit a 9.6v 2600mah battery in an AUG with zero mods (already done it myself).

Your P90 may hold the same battery brick as the one you linked, but that one seems to be 4/5 AA to me.

[MadMax]

Matching matches cell capacity which is really only important in series configured cells. A weak cell will have a lower capacity and end up getting dragged into deep discharge if the other cells in the pack have a higher capacity. Deeply discharging the weak cell will further reduce it's capacity so your entire pack fails when that cell dies.

It seems to me that cell matching is really more for the r/c car guys who regularly run their packs into the ground several times a day. Airsofters usually give up once their mechbox stops turning over and charge up again.

When your battery performance is observably lagging, stop shooting so you don't keep punishing that one weak cell and recharge.