Anyways I’m not focuse don that laptop, just a related incident.Īny ideas about this would be great, thanks in advance. I tried to calibrate it a few times but I guess the way Linux handles battery readings for some laptops it just doesnt work?īecause on my older laptop I have that I have a Debian based distro installed it reads 100% capacity while it’s 3 years old and last read 89% capacity. I have removed Windows from my Laptop because I don’t really use Windows.Ĭould this just be an error since I don’t really calibrate the laptop? I checked with BestBuy Geek Squad last year about the issue and they said they saw no damage to the hardware or battery and that everything tested was fine. A few months ago I tested this on Windows, it doesn’t show the exact percentage on the Lenovo vantage app for me, but based on the statistic from Windows side it should be around 98-97%. I usually keep my laptop plugged in when in use, as you can tell based on the charge cycles, on Linux the capacity has been dropping at a fast rate. If you're plugged in it will run on A/C and the battery shouldn't move. So maybe Lenovo is being conservative here, from the factory.I have a Lenovo Yoga C740 15.6" that I bought last summer in 2021. So I use my laptop on the battery it will discharge till the end but won't start charging until below 30 even if I plug it in. But then again, why 4.15v per cell? Even batteries since the 2000s have been able to handle 4.20v. Most other devices, including the past 4 laptops I've owned, dating back to 2013, charge to at least 4.30v per cell, so maybe Lenovo simply isn't using high voltage cells. My comment is just an observation - that on my ThinkPad, fullcharge voltage is about 4.15v per cell. You can watch your battery voltage, via BatteryInfoView. Laptop batteries are commonly in series and paralell, so if it's a 3 cell-battery, the max charge voltage is usally about 12.6v - that's 3x4.2=12.6v full charge voltage at 4.20V per cell. BatteryUniversity states that voltages over 4v per cell stresses the battery, although the aforementioned Li-HV (Lithium High Voltage) cells may have a lesser effect. However, over the years, there have been safety/chemistry improvements that allow for full charge voltages of 4.30, 4.35v, and even 4.45v Lithium Ion batteries. In the past, standard full charge voltage is 4.20v per cell for Lithium-ion batteries. In another comment, Mark points out that TLP interferes with the firmware power management, so my next task is to figure out how to set charging thresholds without invoking the problematic features of TLP (any suggestions are welcome). – If you always use an AC adapter and rarely use battery start charging at 45% and stop at 50% Usage between 50% and 100% then start charging at 75% and stop at 80% – If you frequently use the battery but don't fully discharge. – If you often discharge your battery to near empty (< 20%) then start charging at 95% and stop at 100% There is a lot of interesting information in the post and the comments, but of I mainly wanted to convey the info Mark forwards from the Lenovo battery team concerning battery thresholds:įor battery charging thresholds I recently dug into that a bit and got the following guidance from the battery team: In searching, I found the blog post Lenovo ThinkPad X1 Yoga: impressions, bugs, workarounds, and thoughts about the future by u/PointiestStick where Mark, the Lenovo technical lead for the Linux team, chipped in to answer questions in the comments. I have a Carbon X1 Gen 9 and was interested in its power management and battery thresholds, and how to tackle these issues when on Linux. Lenovo Photo Library (including lots of wallpapers) Mirror of Hardware Maintenance Manuals for discontinued models Lenovo Windows Digital Download Recovery Images Lenovo Parts Removal and Replacement Videos (select ThinkPad tab) Specification guides for discontinued models When reinstalling Windows, try the Lenovo disc images, as longer battery times have been reported, probably due to custom drivers. A can of compressed air may be useful too, and a bottle of isopropyl alcohol and cotton buds are good for cleaning, but not on the screen. The only tools you need for servicing a ThinkPad are a set of small screwdrivers and a nylon spudger (for taking the screen and keyboard bezels off), and possibly a pair of tweezers. Corporate bulk purchasers don't usually go for it. Not only will it have better brightness, colour, contrast and viewing angles - you will most probably more than make up the investment when selling it. When buying a new ThinkPad, consider taking the IPS screen option if possible, as it doesn't cost much. When buying a used ThinkPad, remember to check that the BIOS is not locked with a supervisor's password and that Computrace is not enabled and activated. For IBM/Lenovo ThinkPad laptop enthusiasts.
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