The TRX-4M runs on a two-cell LiPo pack (7.4V nominal). The simplest, recommended option is a Traxxas iD 2S LiPo battery that plugs directly into the model’s electronics. This article explains what that means, how to choose a pack, and best practices for care and compatibility.
Battery type and compatibility
The TRX-4M is designed for a 2S LiPo battery (7.4V nominal). For the easiest setup, use a Traxxas iD 2S LiPo battery, which matches the vehicle’s connector and charging expectations. The stock electronics are not configured for 3S or higher LiPo packs, so using a higher-voltage pack can damage the ESC or drivetrain and may void warranties.
If you opt for an aftermarket option, ensure the pack remains a 2S configuration and that the connector matches or is adaptable to the TRX-4M’s battery port. A proper LiPo charger capable of balancing is essential to maintain pack health and performance.
Common battery options and features to consider when shopping for a TRX-4M battery include cell count (2S vs. higher), voltage, capacity (mAh), discharge rating (C), and connector type.
- 2S LiPo battery (7.4V nominal) sized for 1/18-scale crawlers; typical capacities range from roughly 400–1000 mAh for the TRX-4M, with higher C-ratings (20C or more) preserving torque on climbs.
- Traxxas iD 2S LiPo packs for straightforward plug-and-play compatibility with the stock ESC and charger.
- Non-iD 2S LiPo packs can be used if you have the appropriate connector or adapter, but check compatibility with the ESC and charging equipment before use.
In short, choose a 2S LiPo battery with a suitable capacity and a connector compatible with the TRX-4M’s port, and pair it with a LiPo charger that can balance cells properly.
Choosing the right battery and care tips
When selecting a battery for the TRX-4M, balance your runtime needs with weight and handling. Larger capacity packs (more mAh) provide longer run times but add weight, which can affect acceleration, steering, and climb performance. Lighter packs improve agility but shorten runtimes. Always opt for a high-quality LiPo pack with a suitable C-rating to sustain peak power during crawls.
Connector and charging considerations
Use a connector type that matches the TRX-4M’s input. Traxxas iD packs simplify charging and running, but if you use a third-party pack, verify compatibility with the ESC and ensure you have a LiPo-compatible balance charger. Always balance-charge LiPos and never leave them charging unattended. Store LiPos at the recommended storage voltage (about 3.8V per cell for a 2S pack) when not in use to prolong life.
Summary
The TRX-4M is wired for a 2S LiPo battery (7.4V nominal). For the easiest setup, choose a Traxxas iD 2S LiPo; ensure the connector matches, charge with a LiPo balance charger, and pick a capacity that fits your runtime needs without overly weighing the model. Avoid using higher-voltage packs like 3S, which can damage the ESC and drivetrain.
Bottom line: the standard, recommended battery for the TRX-4M is a 2S LiPo pack designed for compact crawlers, with careful attention to connector compatibility, charging, and safe storage to maximize performance and longevity.