I made my own battery straps because I'm using a 5S 6000mah battery. I went to the Japanese home improvement store and bought a roll and custom made some for my batteries.
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)