Associated TC5 Factory Team LiPo battery retainer
From Team Associated for the TC5, TC5R, and TC5F, the Factory Team LiPo battery retainer has been CNC machined from 2.5mm woven carbon fibre and attaches to either the 2.5mm standard or 2.0mm ITF chassis using the existing battery post holes with the supplied hardware. Designed for use with LiPo batteries that meet ROAR/EFRA specifications, the retainer positions the battery towards the center of the chassis for improved weight distribution and easier access to socket-style battery connectors. The outer shelf of the retainer is sized to accommodate lead ballast (or similar) for chassis balancing and to bring the car up to the updated minimum weight. With a typical electronics setup, the chassis can be equally balanced left to right while achieving the minimum weight requirement. Additionally, the inboard battery position allows the inner ESC power wire to be inserted and removed with no interference or risk of a short circuit.
Source: Associated [rc10.com]