This Rcharlance Power Hub can be used to power multiple devices from the same power source. It can also be used as a quick battery voltage check. This is very useful at races as it immediately shows the full voltage of the battery without having to go through a boot up sequence or individual cells.
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You can get your own here:
https://www.banggood.com/Rcharlance-P...
CNHL 6S 1250mAh Battery: https://www.banggood.com/CNHL-MiniSta...
Gaoneng 6S 1300mAh:
https://www.banggood.com/Gaoneng-GNB-...
CNHL 4S 1300mAh Battery: https://www.banggood.com/CNHL-MiniSta...