Battery charging circuit

The relevant section in the manual is empty. What kind of battery can the onboard circuit charge? LiPo? LiFe? What is the cutoff voltage while discharging?

If I want to bypass the 6V regulator and feed full battery voltage to my HV servos, can I simply connect the battery + to servo +V rail (and don’t use rc_enable_servo_power_rail())?

Ari.