If charging for 2S, two lights are red and one is green; if charging for 3S, all three lights are red. JHEMCU SPP-SBUS 8CH SPP Signal Converter PPM PWM SBUS Conversion Module. 1-3S 2S-6S Lipo Parallel Balanced Charging Adaptor Board XT60 T Deans XT90 Plug.
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