Phantom 3 Standard Charging Circuit

[icarus179]

Hello I just bought a used P3 standard and installed the argtek range extender to the transmitter. When I unplugged the battery for the controller, the wires pulled out. Long story short, I momentarily got them wrong and now whenever the battery is plugged in, the green light on the controller is on. When I go to plug it in there is no change indicating that it is not charging. Is there any way to obtain a balance charger just for the remote battery? I know it works fine when the transmitter battery is charged and I'd hate to buy another transmitter and not be able to bind it.