OliYin 1pc 6X JST-PH to 4mm Banana Parallel Battery Charging Cable 25cmThis harness makes it possible to charge up to 6 batteries with JST PH connectors together in parallel. To calculate the proper input voltage simply choose 1 6 same voltage and mah batteries, and add the mah's of all the batteries together. For example if charging 4pcs 1S 200mah, you would set the charger to charge 1 1S 800mah battery. Battery Side: 6 JST PH Plugs Charger Side: 4mm Banana Plug Main Wire Gauge: 12awg Silicone Main Wire Length: 10cm