The battery life of my cell phone lasts for about 6 hours. About 2 days ago I downloaded the app CPUControl to reduce the speed of my CPU. This resulted in more than 20 hours of battery life. However I changed the settings and I haven't been able to achieve the results I had before. I have a 4 X ARM Cortex-A7 CPU with a top speed of 1.3 GHz.
When I change the speed to 600 MHz, the change only lasts about 2 minutes ant then the processor goes up to 1 GHz draining my battery life very quickly.
You can't tell the difference between the processor running at 600 MHz or 1.3 GHz, either way it's fast enough.
What happened, how come I cant lock the processor speed anymore?