5s a123 dimensions
 

do 5s a123s have similar dimensions as 6 nimhs or do i have to have a special battery tray in my 3906 emaxx to run a123s 4s or 5s

Depends on the configuration. 4s A123 (double shotgun) will have similar dimensions to 6cell NiMh, but about 8mm wider and a couple millimeters taller.

EDIT: If you could only make one thread per topic, it would be appreciated.

Thats been my only complaint about a123's - they're big. I did my 1st set into sbs as a 5S1P config and its big, roughly 140mm x 72mm x 30mm (l x w x h). This was super easy to do coming out of a Dewalt pac, one was already basically already made, other had to have extra connection between cells. Its the width of the sbs config thats the prob. I can fit it nicely behind the trans and motor on my flm Emaxx, but thats about it, can stack two back there for a 5S2P.

My next a123s will be 6S pacs in a stacked tube config - start with a dbl shotgun and lay another on top for 6S. I know it will fit the older E's trays, not too sure on the new one. Its for my G2R and I've seen them fitted so I know they work for that. The stacked tube is a lot more likely to fit versus a sbs config - I know that won't fit.

Stick packs are the way to go if you want space savings, like the tanic A123 packs... that is what I will be converting mine to.

I don't have the actual measurements, but here's some comparison pics I took a while back. The a123 packs are 2s2p and 3s2p.

http://i192.photobucket.com/albums/z...7/DSC09213.jpg

http://i192.photobucket.com/albums/z...7/DSC09214.jpg

http://i192.photobucket.com/albums/z...7/DSC09219.jpg

http://i192.photobucket.com/albums/z...7/DSC09220.jpg