01-04-2018 03:55 AM
Well, after more than a month, I have my tab in my hands again.
I send it to RMA on 11-26-2017, and received on 3-1-2018...
I hope to explain well, english is not my native language
I have some bad news...
They change the 2 batteries, and the control pbc that manage energy.
Then, install Android 6 (without april update).
I start the tab, and again, only 4.300mah is showing.
They told me all capacity (10.200mah) are in use, due the pbc energy manager switch correctly into both batteries.
- Replaced 2 batteries and pbc energy control
- Install first Android 6 update (no april update, so this update is not the problem)
- Battery capacity continue showing as 4.300mah
- Results: I charge the unit at 100%. and with normal use (only wifi and brightness less than 50%), only 5 hours of screen.
- Conclusion: Android 6 on this tab is eating the 10.200mah battery :/
(I send a pic of the batteries replacement)
01-04-2018 06:05 AM
Thank you for the information update. I was waiting to see if you had success before I sent my tablet for repair. Seems like I would be wasting my time getting it done. Bad news
01-04-2018 06:24 AM
I contacted Lenovo on facebook about this since they don't seem to actively monitor their own community threads..
Person i spoke with basically washed his hands, and said put it into servicing.
There doesn't seem to be ANY ownership or responsibility on the dev side for resolving their own messup.
i'm very bitter on this, and will be actively warning others on buying lenovo products.
03-16-2018 11:40 AM
05-21-2018 06:28 AM
I just found out the reason for showing 4300mAh battery instead of 8500mAh. The same must be for yours too.
I talked to a technician. He told me that there are two 4300mAh bateries wired in serries, in the Lenovo Yoga Book (and other Lenovo tablets). Which means the tablet works on 12 volts.
8500mAh is the total capacity of two batteries that are valued at 3.8volts. Combined together in serries, they are boosted to 12v and run at 4300mAh.
Its a kind of semi scam by the Lenovo company, where they advertise the battery as 8500mAh (or 10050mAh in other models), which is a common practise in other popular brands.
Late for you but hope it helps everyone.
05-29-2019 06:13 AM
SOLVED mostly. Just bought 2nd hand 64gb yoga tab 3 pro. Battery was eating itself. Realised it was the same issue i had with my google pixel 2 a couple of years ago on android 6 i think. Battery drain (under settings, battery) the first day with tab pro was 5% screen and 15% android system. Screen should be worst drain by a mile. Like my pixel on android 6 this is rogue apps driving android nuts in the background. Install Greenify to shut them up. Follow instructions carefully. I also install "Dimly" for screen dimming. Worked for me on pixel and working now for tab pro. Projected for an hour and a half and still had 70% reserves. That would equate to nearly 5 hours with projector. As with pixel I've had to do one restart since as android system lost it's mind again (without Greenify catching it) but its been fine again since. Be careful with apps you install too and if everything goes south check your recent apps list. This forum helped me re-figure it out with diagnostic test mode showing that both batteries are actually running. Great that i found this because i was about to send the tablet back to ebay supplier. Glad i didn't, it's an awesome piece of kit!!! Hope this helps.