Mauch 4-14S Premium Line Dual Battery Kit

From: $160.40

This complete kit provides all the components and cables necessary to power your flight controller and other onboard equipment.

What’s included:

  • 2x Sensor boards: 50A, 100A, or 200A current sensors
  • 1x Power supply: HYB-BEC with 1, 2, 3 or 4 outputs
  • 1x Sensor Hub X2
  • 1x Flight controller cable
    (please select the correct cable to match your flight controller)

Please review the Mauch warranty for returns and replacements.


The Premium Line BECs are lightweight and provide the most versatile solution for most power applications.

Reverse polarity protection, as well as TDK input and output capacitors to prevent burnout due to voltage spikes.

The BEC measures the output current and increases the output voltage by a few millivolts depending on the output load. This compensates the voltage drop in the connection from the BEC to the flight controller and to the receiver, and keeps the voltage more stable.

Bright blue power indicator LED.

Inclusive LDO power supply ( 5.00V /- 0.03V) for the Sensor Board, Sensor Hub X2, or Sensor Hub X8.

Please connect the minus/black wire of the BEC as close as possible to the main battery, as this is used as the ground reference for the voltage measurements.

The PL BEC comes without flight controller cable, so please select the correct cable to match your flight controller:

Why is the output voltage to the flight controller 5.35V and not 5.0V?

Flight controllers such as the Pixhawk have internally a 3-way power selector over an ideal diode chip. The 3 ways are: USB, the power port, and the servo rail. The flight controller can be powered by either one of those power sources. The flight controller is designed to select as the internal power supply whichever power source has a voltage higher by 0.25V to any other power source, as long as this voltage does not exceed 5.70V. To prevent the internal ideal diode from switching too often between different power sources, a slightly higher input voltage (5.35V) is supplied by the PL BEC.

Calibration Values Provided and Ready to Input into Mission Planner

Having accurate calibration values configured in ArduPilot is of paramount importance for the proper computation of battery consumption, as well as the reliability of alerts and failsafes which are critical safety features. Each Sensor Board is individually tested with a flight controller and the calibration values of the specific Sensor Board are determined. The highly accurate calibration values of each Sensor Board is provided in a format that can be directly entered into ArduPilot. Not everybody is willing to go through the steps of properly calibrating their power module. The Sensor Boards remove the need for users to painstakingly perform the calibration steps.

1. In Mission Planner, under INITIAL SETUP >> Optional Hardware >> Battery Monitor, set the “Sensor” to “Other”.

2. Enter the “Voltage divider” value provided with your Sensor Board, then click out of the field to save the value. The calculated “Battery voltage” value should be within a few millivolts of the actual battery voltage.

3. Enter the “Amperes per volt” value provided with your Sensor Board, then click out of the field to save the value.


Advantages compared to other power modules

  • The current measurements use the full range of analog input voltage of the flight controller from 0.0V (corresponding to 0A) until 3.3V (corresponding to 50A, 100A, or 200A, respectively), so there is no need to adjust the parameter “BATT_AMP_OFFSET.”
  • The original 3DR power module and most Atto boards experience voltage drops during hover (0.5-1.5V) caused by the resistance of the connectors and wires. In the Sensor Boards, the voltage drop error is minimized as only the resistance of the positive battery wire is measured. Additionally, the power supply for the BEC is separated and can be connected as close as possible to the battery. This results in more stable voltage/current measurements, accurate to /- 0.5%.
  • Furthermore, the voltage sensor has a filter which reduces the risk of false RTL trigger, which might otherwise happen in very windy conditions due to sudden motor speed up.
  • The maximum output voltage of the sensor board is limited to 3.3V, so there’s no risk of damaging the analog inputs on the flight controller.

Quality Control

Each Sensor Board is thoroughly bench tested using MAUCH’s rigorous process. The final QC is a setup with a flight controller (Pixhawk 2.1) and connected to Mission Planner to check the current and voltage calibration values.
Do you know any other manufacturer who uses an actual flight controller to test the calibration values of power modules?

Sensor Hub X8 test bench, including Pixhawk 2.1, Power-Cube and 8x sensors

Sensor Board Voltage Selection:

If using a battery up to 7S, you can close the solder bridge on the Sensor Board to achieve more precise measurements at those lower voltages. In this case, use a voltage divider value of 10.0 (the measurement will be fairly accurate) or perform the voltage calibration procedure for ArduPilot.

If using a battery of 8S or more, or if you decide not to close the solder bridge, use the pre-calibrated voltage divider value provided with your sensor (around 27).


Use double side tape or screw onto the frame by removing the M3 screws and drilling holes into the frame. Reinstall the screws through the frame. The original screws will be too short, so please replace them with longer ones according to the thickness of your frame.