Configuration & How to Use
1. Switching Between 1S (4.2V) and 2S (8.4V) Modes
The module features an on-board solder jumper labeled ''SET''.
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1S Mode (4.2V default): Leave the SET pads open (un-soldered). Input voltage can be as low as 5V (e.g., standard USB).
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2S Mode (8.4V): Short/solder the ''SET'' pads together. You must increase your input voltage to a minimum of 10V–12V (a 12V DC power adapter works perfectly).