Maximum charge at any given time (MC) To find this the battery requires a complete discharge and a full 100% charge
MC divide by DC will indicate the wear on the battery in terms of capacity.
Other wear is harder to assess
Heat damage by fast charging may be breaking down some insulation and that sort of wear is more difficult to assess. One way of measuring it would be to measure the battery charge low when not powered on.
This type of degradation id more often liked to the cycles that a battery goes through.
So we have wear as in capacity (CA) and wear as in cycles (CY)
I’ll let someone else find a formula for their interaction
Technically true because they are at least charged (once or more) at the factory.
However, a lot of the time, a [good] new battery would be able get a full charge capacity anywhere between 1-5% above designed capacity. My Framework laptop was able to get a full charge about 1% above the designed capacity for the first 5-8 cycles.
I joined this thread not so much to mention my battery wear but to comment on the fact that replacement batteries are still not available to buy 15 months after the first computers were shipped. That is incredibly poor logistics.
I used it fully on-charge at no cap for a month or so, capped at 80 and fully on-charge for around six months, and then the past few months back at no cap with daily on-battery use.
SleepStudy says my effective capacity is 94%, so I’m very impressed. I typically get 6 hours of note taking/web browsing and then charge it back up for some more use before leaving it charging overnight. The battery life itself has been pretty consistent in that respect, but I’d still be first in line to buy a drop-in battery upgrade.
So my battery wear has taken a pretty drastic turn the past few months. My batch 4 1135 running Win 11 went from 4% to 2% from last October to this August, but the end of September gave me 7%, which I think is fine and within likely error, but today it checked in at 12.1%. I did a calibration 5%-100% charge the last few checks to try to be consistent. Anyone else have “sudden” wear like this?
I haven’t checked on a consistent basis like @amoun and can’t say how many cycles I’ve been through, but my use (4-6 hours on battery workdays) hasn’t changed drastically.
As my previous post containing data has become uneditable here is my latest offering. There is no clear understanding of why, late in November the wear jumped to well over 5%. At one instance it was 5.8 but today has dropped to 4.1
29th Nov Just after updating to BIOS 3.17 and the wear now reads 5.0 ??
5th Dec Changed charge limit from 78 to 100 to 78 and cycles increased by 1
The blip around the 13th Dec :: I’m wondering if the cold weather, as it was only 2 or 3 degrees above freezing for a few night where the laptop was left for some 16 hours a day.
Anyway I accidentally used without power so fully discharged (3%) reset Battery charge limit to 100 and wear has dropped from 5.9 to 4.6
Hi this is my final update on ‘my’ battery wear as posts can only be edited for a month and posting more doesn’t seem ‘right’
My laptop and battery are 10 months old and given the latest data the battery hasn’t worn during that time. There are anomalies. Most of the time I use the laptop plugged in after the first couple months, this is where it started to ‘decrease’
I usually use hibernate in Windows on ‘lid close’ however five days ago I was using Ubuntu and closed the lid, which is not set up to hibernate. When I powered on and let the battery charge some 6% back up to it’s preset 78% I checked the wear. I was surprised to see it had dropped 1% ~ effectively taking the wear back to where it was when I received it.
So here is the latest graph as of 30th Jan 2023
This graph will be updated until the end of January when the post will close. As I will not be adding another post, battery wear after 11 months will be found at my Framework site
The graph shows the lowest value for each day. See link above for more readings
I have an 11th gen framework from 11/2021(1.25 years old). My battery stats are:
80 cycles
capacity of 96.0246%
BIOS charge capped at 80%
It’s on 24x7, and most of the time it’s plugged in. The usage is mostly light(web browsing/text editing/email) a couple hours a day.
Everything seems fine so far. I surely worry about the battery far more than I need to. Especially considering it’s so inexpensive and easy to replace if there’s ever a problem with it.
I took the battery out of the laptop to look for a manufacturing date on the bottom(I couldn’t find one). It was securely held in with screws and plastic tabs instead of god awful adhesive. The screws were numbered and captive(impossible to loose). It’s hard to imagine a significantly more user friendly experience!
12th gen i7-1260p here.
After 4 months (received 13 Oct. '22) my battery capacity is currently reading as 98.5162%.
Only 9 charge cycles used.
Plugged into mains power > 95% of the time.
Charge limited in UEFI settings menu to 65%.
In the first week to 10 days I used it regularly off mains power and was charging it to 100 %; within the first week the battery capacity dropped to about 94.5%.
I did a bit of reading up on the battery here and did a couple of full discharge/recharge cycles and set the charge limit in the UEFI settings. Since then the laptop is rarely used off mains power and with the 65% charge limit the capacity reading has climbed back to about were it was when first used at about 98.5%.
