[LeEco Le 2 Guides, News, & Discussion] twistyplain:
I have never got this much screen on time on the leeco le 2 (SD version) so I just had to share this with somebody... anybody really. Whomever has done better please feel free to share your awesome le 2 battery life with smallEUI, stock,or any other rom (doubtful).

So I just got 8 hours and 30 minutes of sot running smallEUI version 3 with illusion kernel v2.5. (Note: I used v2.5 because v3 uses lazy plug for CPU hot plugging which IMHO has far more battery drain than the stock Qualcomm core control) but I digress...

Anyways, I am a heavy gamer and frequently play real racing 3 for more than 1.5 hours in some days Today I decided to cut back and only played it for 25 minutes.This reduced gaming time enabled me to subject my phone to a more mixed use pattern. When I started I wasn't even looking to break any screen on time records but at around 21% battery remaining, I was at 7 hours SOT so I decided to keep using the phone normally until I ran it down to empty.

Here's some background to this achievement...

First off, I don't run anything on stock settings. I use a slimmed down EUI rom, a custom kernel to boot, and minor tweaks to the build.prop. I have done major tweaks to the custom kernel, use greenify in elevated mode, and block the recommended wakelocks on kernel adiutor app. I have also improved thermal thresholds to minimize throttling. When CPU thermal throttles, it leads to more power consumption because it has to stay on longer and use more CPU cycles to finish tasks that it could have completed much faster with high clock speed at the expense of negligible heating. I looked at the stock smallEUI thermal config and was shocked to find that the CPU starts throttling when it reaches temperatures as low as 38 degrees Celsius. (That's too low). The big cores are allowed to hot plug at a measly 40 degrees and at 42 degrees the system is allowed to turn off three of them. Only CPU 4, which is the first big core that controls the other 3 is exempted from being turned off due to this insanely low threshold. However, it doesn't escape the overall thermal tolerance which is set at 38-70 degrees. At which point, it will be doing just 883MHz before getting completely shut down! We all know (I hope we do) that big cores are generally more efficient at higher clock speed but someone must have missed the memo here. (Big cores are set to throttle down to 998MHz at just 50 degrees! Crazy, right). [MENTION=6929309]iaureeel[/MENTION] should look into this.

For monitoring, I use better battery stats xda edition, gsam battery monitor, and kernel adiutor overview page. I don't have WiFi so all data comes through 4G (the signal is usually above average to excellent) -- this phone has better reception than any other I've ever used ??

The usage:

Here's a summary of the notable things I did. You may browse the screenshots to see more.

First off: Games...

I played real racing 3 for around 25 minutes

Tried out a newly downloaded (on this same charge cycle) 3D game called war wings -- Around 20 minutes. Spoiler alert: it's awesome?

Starting with full charge and hammering the battery to about 15%, I can play real racing 3 for 4 hours non-stop.

Others:

I watched some YouTube over 4G for 30 minutes

I used brave to browse the web for just over an hour.

Side note: surface flinger showed up on BBS probably because I speeded up scrolling in build.prop. It shouldn't be this active but the power draw is probably not too significant.

How I did it

Recap of what enabled me to have this sot figure:

1. Optimized custom EUI-based ROM (smallEUI)

2. Custom kernel (heavily customizable and tweaked to kingdom come)

3. Greenify

4. Higher thermal tolerance for the CPU (it doesn't even get hot enough to be uncomfortable even at highest load. The plus for the battery here is that the CPU completes tasks much faster and then goes into a quick race to idle (thanks to a tweak I've added to blu_active governor for big cores)

5. No automatic brightness! I often get by with minimum brightness but when I need more I manually bump it up to 10-25%. 50 % is enough for me to comfortably use the phone outside. And not in direct sunlight because who can compete with the sun? Not any phone's display. THAT'S FOR SURE!

6. Cherry-picked build.prop tweaks

7. No Facebook, Instagram, Snapchat, and other naughty social apps that put your phone in a wakelock chockhold until its precious juice is depleted.

Conclusion:

I have never been one to hunt screen-on-time records (and wasn't in this case) but today has showed me a side of this phone that I didn't know existed. That's really good battery backup. I didn't think it was this easy but leeco did some clever things too in order to make it possible. First is charging the battery to 4.4 volts which increases charge holding capacity to 110% of the reference design. I don't recommend that you charge to 100% because it will be at the expense of battery life span. (Unless leeco uses a military grade battery like they do in the Coolpad cool 1 dual and LeRee le 3).

Another thing that helps is the inclination of EUI towards power saving. SmallEUI is even better because it saves power without hindering user experience. Notifications come on time and there is no stuttering even on stock everything.

Full disclosure: My phone is brand new(ish) at just one month old.

That's all for now... Check out the screenshots. As they say, the proof is in the pudding ?. There's a limit to the number of files I can attach so I've put the rest in a .zip file