Hold down, battery/ hold down retainer/ battery post/ foam spacer/ angled body clip (allows for installation of taller, multi-cell batteries) | Traxxas
Traxxas Slash 4x4 VXL RTR TQi TSM Fox without Battery & Charger - Heliland.com
Traxxas 1/10 Slash 4x4 VXL POWER CELL NIMH BATTERY - 3000MAH 7.2V 6S ID STICK 700118673928 | eBay
Hot Racing Traxxas Slash 4x4 LCG Tall Battery Hold Downs LCF126X06|Parts & Accessories| - AliExpress
Traxxas Monster Slash 4x4 Battery Comparison 2s vs 3s LIPO 25c to 75c to 150c burst - YouTube