Why regulate a 5-cell pack?

Virtually all modern servos work very well at 6V-6.6V and adding a regulator to a 6V pack simply introduces another point of potential failure for no gain.

Not only is it something else to go wrong but in the case of a linear regulator, you simply end up wasting a portion of your valuable battery charge as heat.

What's more, since all regulators will cause *some* voltage drop, you're actually *reducing* the amount of headroom (safety margin) that you're providing your receiver against brownouts.

It's not atypical for a linear regulator to have a minimum drop voltage of as much as a volt or so. That means when you put 6V in you're not going to get much more than 5V out. While your battery is working well and charged, that's not a problem. However, if you lose a cell then your battery voltage may drop to 5V and thus the voltage fed to the receiver/servos will fall to 4V dangerously close to the reboot voltage if you're flying some 2.4GHz systems.

Don't waste your money heating the air in your plane with a regulator just use the 5-cell pack direct.

Or even better, invest in a LiFePO4/A123 pack and enjoy the additional benefits this new battery technology offers.

_________
When I'm not here I'm at [link=http://rcmodelreviews.com]RCModelReviews[/link]