Battery Punch Archives - RC Discharger

iCharger DUO Resistor Bank Setup | 40A Discharge Guide

Ready to see what your batteries can really do? Setting up your RC Discharger Resistor Bank correctly is the key to achieving those high-amp discharges that give you the “punch” you need on the track.

Follow this precision guide to configure your iCharger DUO (308DUO, 406DUO, 4010DUO, DX6, DX8, DX12, 456DUO, 458DUO and 4512DUO) for maximum performance.

Step-by-Step Configuration:

Physical Connection: Connect your battery discharger (resistor bank) to Port #2 of your iCharger DUO.
Program Mode: Navigate to the menu and select Discharge under the Program Mode settings.
Regenerative Mode: Scroll to the Regenerative Mode option and select To Channel. This tells the charger to dump the energy into the resistor bank on the other port.
Calibrate (Channel Join): Tap the SET button to calibrate. Under the Channel Join setting, ensure the iCharger reads “Resistance or Bulbs”.
Voltage Limit: Set your Voltage Limit to 24V.
Current Limit: Set your Discharge Current Limit to 40 Amps.

Why the Settings Matter

By setting the charger to “To Channel” mode, you are essentially turning Port 2 into a massive energy sink. This allows you to pull high current (up to 40A) through your race packs on Port 1, simulating real-world race conditions and lowering internal resistance for maximum power.

Pro-Tip: Always double-check your connections before hitting “Start.” A solid connection ensures accurate IR readings and consistent discharge curves!

RC Wire Gauge Guide | Why 10AWG is Better Than 12AWG

Did you know that ambient temperature drastically changes how much power your charge leads can actually handle? It’s not just about the amps—it’s about the heat.

Most brands don’t design their charge leads for the extreme stress of heavy cycling. Many stay stuck at 12AWG, but when you look at the physics of high-performance racing, the math simply doesn’t add up.

The Heat Reality Check

Resistance creates heat, and heat kills performance. At an ambient temperature of 40°C (104°F)—which is common in many summer pits—a standard 12AWG wire is only rated for roughly 24 Amps.

If you push 30A or 40A through that wire in the heat, you aren’t just risking a failure; you are generating excess resistance that chokes your battery’s punch.

The RC Discharger Standard

We don’t settle for “standard.” This is exactly why we use a minimum of 10AWG on our gear. We build our products to handle the blistering heat of the track and the high-current stress of professional cycling protocols.

Safe Amp Limits by Wire Gauge

Don’t let your leads be the bottleneck in your racing program:

Wire Gauge	Safe Limit at 20°C (68°F)	Safe Limit at 40°C (104°F)
12 AWG	~30 Amps	~24 Amps
10 AWG	~50 Amps	~40 Amps
8 AWG	~80 Amps	~64 Amps

Build for the Heat. Race for the Win.

Stop losing power to thin wires and heat soak. Upgrade your pit game with the heavy-duty standards used by the pros.

Get the Sensor Here: RC Charge Lead – RC Discharger