Dave yes there are input LED's for each battery. i have posted info from the instructions for the regulator.

Servo Power LEDs
The servo power LEDs show the servos are getting voltage greater than 5.4V.
If the regulator output drops below 5.4 volts the LEDs will go out. The most
probable cause of the regulator output going below 5.4 volts is that the voltage
at the inputs (Deans connectors) is going below 5.9 volts. Possible causes of
the inputs going below 5.9 volts would be low batteries, wiring that is not up to
handling the current causing excessive voltage drop or bad solder connections
on the connectors.


Receiver Power LEDs
The receiver power LEDs show the receiver is getting voltage greater than
4.75V. If the receiver regulator output voltage drops below 4.75 volts the
LEDs will go out. There are two possible causes of the receiver voltage going
below 4.75 volts. First the load the receiver is presenting to the regulator is
greater than one amp causing the regulator output to droop. This could be
caused by directly plugging something into the receiver that is overloading the
circuit. The second cause of the receiver regulator going below 4.75 volts is
the input voltage to the receiver regulator has dropped below 5.4 volts. This
means the input voltage on the Deans connectors is probably below 5.9 volts
for some reason.



Alan