The OnBoard RC-Charger allows to charge/buffer up to two RC-receiver batteries from the engines main supply battery.
This system is typically usefull in connection with generator type engines.
The engine sided generator will make sure that the engines supply battery remains fully charged during engine run, therfore the engine battery is the ideal power source to also keep the receiver batteries at full charged level.
The OnBoard RC-Charger will connect to the 4-pin Molex expansion connector of the engine and transferconditioned/regulated electrical energy to the receiver batteries. For this, two independant voltage and current regulated outputs are provided which would directly connect to the receiver batteries.
The outputs are optimizes for 2s LiPo or 2s LiIon RC batteries (other setups on request)

ECU battery voltage range: 9-24V (=input)
2x regulated outputs with 8,4V/2500mAh max each.
Idellay suited for 2s LiPo or 2s LiIon RC batteries (>1500mAh ideal)

Downloads

https://www.jetcat.de/jetcat/Connection%20Chart/RC-Charger-Connection/RC-Charger-Connection.pdf