Mamba Max Tweaks and Mods Continued

[BrianG]

Some UBECs are able to go into "bypass mode" if the voltage falls below acceptable limits for the switcher to work right. It would depend on the UBEC though. Running a UBEC at 7.4 would work, but you might get slightly less voltage than 6v. However, 2s can get as low as 6v near cutoff, so your servos may see less than 6v at that point.

To help eliminate the problems with drop-out voltage at 2s, consider using a 5v UBEC. Even 2s near cutoff (6v) lets you use a UBEC with a 1v drop-out voltage. You'll also get more consistent servo performance because of the more consistent voltage.