shorter battery needed 16340

[potholerepairman]

hello, Have a mod that was fixed but now the aw imr 16340 3.7 550 mah batteries will not fit unless you almost break the mod to stack them .Is there a good alternative that is a little or lot shorter(for use with spacers), maybe without nipples in this small of a size?thanks for any guidance, year or so back saw a size chart but can not locate one now.

 

[WillyB]

Ultrafire 15270 Li-Ion Battery, 3.7 Volts, 600 mAh