Re: Backup Battery
 

Just for the record the 7.2 volt backup battery powers the center pin on the PWM outputs of the RC so anything like the camera and servoes are powered by this battery only. The battery also holds up the processor in the RC during brownouts of 8 volts or less and during this time the backup also keeps the radio modem active so that robot to OI communications are not lost. Backup batteries are required.

Re: Backup Battery
 

The vEx motors and servos are allowed on FRC robots this year! and they can only be powered by those PWM connections that Al mentioned. So, if you use these servos or motors on your robot, you want a healthy back up battery.

R73 says you can use any commercially available 7.2v NiCad battery pack...we have a bunch of them for vEx stuff....my guess is we'll use them on the FRC bot.