Are you a smartphone users who often dreams of an all-day battery life with constant use? If you’re reading this, most likely yes. Do most smartphones have batteries large enough to carry 12 hours of juice? Nope.

As a matter of fact, there are a lot of high end smartphones out there that boast 1700mAH and 1900mAH batteries, yet the devices themselves rarely last the entire day. In today’s video I’ll show you how you can get your rooted Android device to last upwards of 12-15 hours daily using a $1.99 application called SetCPU.

The best part of it all is that this plan allows me to have the phone overclocked when it is awake. Depending on your kernel you can push your device’s processor past 1.2GHz when the screen is on and have it underclocked and cool when the screen is off. If you decide not to overclock you can save even MORE battery life. Check out the video for more information.