Strange battery behavior, so i'm searching for a kernel

Here's my problem:
My battery level suddently drop from 50% or 30% to 0% in few seconds.
When i'm in system on (for example) 90% battery, if i go in recovery my battery level is 5%.
I tried a battery calibration program with no results.
My last chanche is to try another kernel but, i can't find one!
I'm searching for a stock kernel with root and recovery for 5.0.1.
Now i'm on rockz1 kernel.
Someone know where to find a stock kernel that i can try without losing root?
Or maybe there is already a solution to this strange battery problem?
Sorry for this noob request.

Report of a strange behavior with android 5.1.1 and before on my S6 Edge

The problem: The first 3 times, while i was online trough wifi on battery modus, it happened to me that of all sudden, the phone tells me, the docking station is connected, while i don't have it connected, not even have a docking station. And then the cursor jumps and it trys to play crazy until i cant operate it and need to close the phone. The first time when it happened, i saved my files and flashed the stock android 5.1.1. But it didn't solve it. The trouble came again. Temporarly i found a solution, i had to remove my custom launcher(i tried many! Also the stock one. The only difference is: Here i only have to clean the cache! ) while in safe mode and when restart all was fine. I checked with almost all free antivirus and antispywares apps, but there was nothing. It also removes allmost all icons after restart and then i have to install again a launcher and the icons will reapear and i need to rearange them again.

The best temporarly solution: After the 3 times, i managed to solve the problem, while leave it untouched and close wifi. It calms down that way without closeing the phone, don't know why. Don't know if its a security flaw, or just because i stay long on wifi. But it happens always when i browse the web and even with all browsers, stock and firefox and chrome. And then it continues to work normaly after i log in to my phone again, while the browser were i was surfing, i encounter as crashed, and i can go wifi again. I don't even know if its a hacking attempt.

But i just wanted to share this, it may help some, and i hope there will be a solution for this, thanks.

[Q] Odd Phone Behavior after flashing H810PR10 (Lost 30GB of memory?)

It would appear that, in my habit of ruining everything, I failed the low effort boot and bricked my new LG G4. Thankfully, I remembered that in this instance you can flash the stock firmware to return to default. Unfortunately, the US firmware wasn't available, but apparently the Puerto Rico one was. I flashed that and got my phone back working just fine, kind of.

First, it doesn't lock normally. Usually, I set it to the 10 minute lock delay, where I just have to swipe unless 10 minutes have passed, then it requires the password. Instead of going to a lock screen, it skips that and just goes right into the phone. It's probably a settings thing, but it's weird.

The worst thing is that I have apparently lost 30GB of storage to "miscellaneous". When I plug it into my computer, it says that I only have 1GB of storage on the whole phone. What is going on here?