The Joshua Bardwell XT30 3s Parallel Charging Board builds upon the extremely popular 4s, 5s, and 6s versions by adding color changing paint rather than tape for a cleaner look, and a power switch for the LCD voltage meter to help avoid over discharging if accidentally left unattended. As with all of the STRIX parallel boards, this will allow you to safely charge up to 10 batteries at once!
The main power lead comes equipped with an XT60 connector which is handy for popular chargers like ISDT. It also comes with an adapter to go from XT60 to traditional 4mm banana style that many chargers still use. The included balance lead is 7 pin XH style and one tab may need to be trimmed to fit properly into the balance socket depending on your charger's needs.
Safety is a major concern for any form of parallel charging. Checking each cell of every single battery before connecting them together is extremely important! If you see a cell's voltage that is not like the rest, do not charge it with the others in parallel! To help with this, we have added a cell checker at the top of the board. You need to check them one at a time before plugging them all into the board, however. We have also provided replaceable fuses between the main power leads to aid in preventing surges from one pack to another. We suggest only parallel charging packs that are within roughly 0.1 volts per cell, or 0.4 volts for a 4S pack. So a pack that is at 15.0 volts total would be safe to charge with another pack that was 15.4 volts or 14.6 volts.
Please watch these videos from Joshua for proper parallel charging techniques: