Oh for ****s sake, do NOT let your battery totally die. THAT is a potentially BAD thing.
To calibrate and condition your battery, check the link in my signature.....
Always works great for me never had to downgrade anything prl wise . You only do this when your swapping roms and when you do a battery wipe through amon. Letting the battery die isn't a bad thing. It can also be good to let the sucker die from time to time. If your always charging it non stop it will destroy it quicker lol.
Everyone has there own way of doing things. Lol just like SBC kernels some use them others don't wanna cook there battery
I only said let it die once there man lol it's not gonna ruin it.