I have 82.2% battery wear, so less capacity in 6 x 18650s left then there would be in one new cell
You?
I just downloaded and ran Nirsoft’s BatteryInfoView and it says 83% wear.
On Linux:
>: cat /proc/acpi/battery/BAT0/info
present: yes
design capacity: 5800 mAh
last full capacity: 5311 mAh
battery technology: rechargeable
design voltage: 10800 mV
design capacity warning: 265 mAh
design capacity low: 185 mAh
cycle count: 0
capacity granularity 1: 80 mAh
capacity granularity 2: 5046 mAh
model number: AS09D56
serial number: 44406
battery type: LION
OEM info: Panasonic
So looks like 91.5% capacity.
Nice little program. Mine says 63% wear. 
For Android there is Spare Parts+ to show some detailed battery info including health (mine shows good). AnTuTu apparently tests capacity (takes a long time).
Judging from the pack pulls I get from lenovos and their battery software, its probably not that far off from correct.
Is it possible you are misunderstanding the data. Surely you would notice if the laptop was down to less than 18% of its original capacity?
Following the link to the Nirsoft site (thanks Chloe) 82.2% apparently means the pack is able to deliver 82.2% of its original capacity.
To quote from the Nirsoft website
Battery Wear Level: The wear level of the battery, in %
The wear level of a new battery should be around 100%, and it gradually decreases. This value is calculated according to the 'Designed Capacity' and 'Full Charged Capacity' values.
What software are you actually using?
Wear level 104.5%??
What the heck is going on?
Probably the BIOS or the battery pack is understating the rated capacity of the battery, and your most recent charge was greater than the rated capacity.
Thanks for the explanation. I hope it’s not overcharging the battery pack. 
I guess I should have said that maybe “your most recent charge was greater than the stated capacity”, since it’s probably just low-balling the actual capacity of the battery pack, resulting in an exaggerated charge ÷ stated_capacity percentage.
Oh, I see. I try my best not to wear out the battery so hopefully it lasts a couple more years. 
i get 5-10 minutes of usage before the battery dies, i use battery bar
Bort, I had that problem until just yesterday when my replacement arrived.
It’s substantially improved now, although I haven’t had a lot of testing time yet.
Haha
I certainly hope you aren't doing anything important if the power goes out. 
The last laptop battery I replaced was showing as down to about 30% (ThinkPad T61P with original OEM 9 cell pack) and then just died overnight and never worked again. I figure one cell must have failed completely and taken out the whole pack.
You are certainly living on borrowed time. 
Sounds perfect for Ebay sniping!
sniping?
i could buy 6 18650 from FT and solder
Thinkpad’s default battery software and Battery bar on other laptop.
Thinkpads software is great!
+1
Not wanting to come off as an IBM/Lenovo fanboi but I've been impressed with the Thinkpad utility for quite a while.
Will have to look into Battery Bar as well. Does anyone know if it allows control of charge parameters or just reports on battery state?
Only reports.
Well, it looks like Battery Bar Pro, which is paid version, has lots more going on than in free Battery Bar, which is couple of years old anyway, the one I have, that is.
You might research it yourself, sorry :)!