Traxxas Servo Digital High-Speed Metal Gear (Ball Bearing) Waterproof Slash 4X4 Optima Parts Confirm that the battery will

Confirm that the battery will physically fit your model and that the electronic speed control supports the selected 4S voltage

or carry on supporting the line once it reaches full viaduct height

Genuine Traxxas part 7773

This is the Altimeter from Estes

Current Drain for Balance Ports: 500mA

Traxxas Servo Digital High-Speed Metal Gear (Ball Bearing) Waterproof Slash 4X4 Optima Parts Confirm that the battery willTraxxas Servo Digital High Speed Metal Gear (Ball Bearing) Waterproof Slash 4X4 Fits: Slash 4X4 Ultimate Unlimited Desert Racer E Revo VXL Brushless Rustler 4X4 VXL TRX 4 Assembly Kit TRX 4 Ford Bronco TRX 4 Scale and Trail Crawler TRX 4 Sport TRX 4 Tactical Unit