I use the battery strap but I'm running lipo with the Diggity Design lipo tray holder. I went with the offset version as it helps balance the car better and keeps my parks from flying out. I will never go back to strapping tape to hold my packs in again. The lipo tray holder in it is virtually impossible to have you pack fly out if you put the tray on properly.
Castle Creations (Since 2005)
Bumps & Jumps RC (One of the best racing facilities around)
ST Racing Concepts (STRC) Great aluminum upgrades for many brands.
Custom Works (Best Oval Cars around). Too many titles to list
Shout out to: Sticky Kicks, CR Graphics and Race Ready Products