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.