Sumo Lipo Conversion
The Sumo runs on 4 AA batteries which equals 6V DC, we are going to convert the Sumo to be able to use a 7.4V Lipo battery without adversely affecting the stock receiver/speed controller.
Unscrew the battery compartments on both sides of the chassis – each holder is fastened using 2 screws.
Cut all wires close to the battery holders, you will notice one wire ties the battery holders together between the two sides, this can be removed completely.
Schoetke Diodes create a 0.7V voltage drop across each diode, in order to reduce 7.4V to 6V we will need to solder 2 Schoetke diodes in Series to create a 1.4V drop. Since the Sumo Draws more current than a single set diode can handle safely, we will be soldering 3 sets of 2 diodes in parallel, the positive input will connect to all 3 sets at the input side and the output will come off all 3 sets at the output side, this allows the current to spread out through 3 individual sets of 2 diodes. You can use more than 3 sets but for the standard motor, 3 seems adequate.
Thank you for Reading.
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