If you read a couple of posts back you can run diodes ( in the correct direction) to drop the end voltage down. Generally a 1N4007 diode will drop about 0.6V for about .1 to .5A and above that the voltage drop can get up to about .8V

Now for a 2S lipo that fully charged can get up to 8.4V fully charged and they only go down from there. The only downside to using Diodes is the power usage only stops when you have no load on the system. if there is any current it will dissipate heat therefore using up Mah's