[{"data":1,"prerenderedAt":211},["ShallowReactive",2],{"en-post-60":3},{"id":4,"title":5,"body":6,"description":12,"extension":204,"meta":205,"navigation":206,"path":207,"seo":208,"stem":209,"__hash__":210},"content/post/60.md","60",{"type":7,"value":8,"toc":194},"minimark",[9,13,18,21,24,35,42,45,48,57,61,64,93,97,149,153,156,173,177,180,184,187,191],[10,11,12],"p",{},"A new laptop lasts a full day, but after a year or two it only works plugged in. That is normal lithium battery aging, but a lot of fast drain is actually a settings problem rather than a dead battery. Check the health first, then optimize, then learn maintenance: three steps.",[14,15,17],"h2",{"id":16},"first-how-much-has-the-battery-actually-degraded","First, how much has the battery actually degraded",[10,19,20],{},"Do not guess, use data.",[10,22,23],{},"Method 1, the most authoritative command line:",[25,26,31],"pre",{"className":27,"code":29,"language":30},[28],"language-text","powercfg /batteryreport /output \"C:\\battery-report.html\"\n","text",[32,33,29],"code",{"__ignoreMap":34},"",[10,36,37,38,41],{},"Open ",[32,39,40],{},"C:\\battery-report.html"," and look at Design Capacity and Full Charge Capacity. Degradation equals (design minus full charge) divided by design. For example, design 60Wh and full charge 48Wh means 20% wear.",[10,43,44],{},"Method 2, the easiest built-in way on Windows 11: Settings > System > Power and Battery > Battery > Battery health, which shows the maximum capacity percentage directly. Some models need the vendor driver.",[10,46,47],{},"Method 3, vendor tools: Lenovo Vantage, MyASUS, Dell Power Manager, and HP Support Assistant all show battery health and a maintenance mode.",[10,49,50,51,56],{},"Below 20% wear is normal; 20% to 30% shortens runtime noticeably but is still usable; above 30% to 40%, or visible swelling, means you should consider a replacement. To confirm the model, see ",[52,53,55],"a",{"href":54},"/post/16/","How to Check Your PC's Specs, Model and Serial Number",".",[14,58,60],{"id":59},"why-it-drains-fast-fix-settings-before-blaming-the-battery","Why it drains fast (fix settings before blaming the battery)",[10,62,63],{},"Troubleshoot by power-saving benefit, highest first:",[65,66,67,71,74,77,84,87,90],"ol",{},[68,69,70],"li",{},"Screen brightness at maximum is the biggest drain on a laptop. Dropping to 60% to 70% extends runtime a lot.",[68,72,73],{},"Background programs such as cloud sync, chat apps, and dozens of browser tabs quietly eat power. Manage startup items and background apps.",[68,75,76],{},"The discrete GPU stays on. On a gaming or all-round laptop that was not switched to integrated graphics, power use doubles.",[68,78,79,80,56],{},"Bluetooth, location, and Wi-Fi left on. Turn them off when not needed. For Bluetooth issues see ",[52,81,83],{"href":82},"/post/40/","Windows Bluetooth Won't Connect, Pairing Fails, or Audio Drops",[68,85,86],{},"High refresh rate screen. Dropping 120Hz or 144Hz to 60Hz saves a lot.",[68,88,89],{},"The browser is a power hog. Chrome with many tabs is a battery killer; switch to a power-saving policy.",[68,91,92],{},"Power mode locked to Best Performance. Do not keep it on while plugged in.",[14,94,96],{"id":95},"_15-runtime-optimizations-just-apply-them","15 runtime optimizations (just apply them)",[98,99,100,103,106,109,112,115,118,121,124,127,130,137,140,143,146],"ul",{},[68,101,102],{},"Settings > System > Power and Battery, set power mode to Best Power Efficiency or Battery saver (do not lock Best Performance even when plugged in).",[68,104,105],{},"On the same page, shorten screen-off and sleep timers, for example 5 minutes and 15 minutes.",[68,107,108],{},"Battery saver: Windows 11 can turn it on automatically below a percentage; enable it in Settings.",[68,110,111],{},"Lower screen brightness to a comfortable minimum.",[68,113,114],{},"Turn off keyboard backlight (Fn combo or vendor console).",[68,116,117],{},"Turn off unused Bluetooth, location, and Nearby sharing.",[68,119,120],{},"Limit background apps: Settings > Privacy and Security > Background apps, turn off the ones you do not use.",[68,122,123],{},"Install a tab-sleeping extension in the browser, or close tabs regularly.",[68,125,126],{},"Unplug unused USB drives and external disks; they draw power too.",[68,128,129],{},"Use Windows power recommendations: Settings > System > Power and Battery lists high-drain items you can turn off.",[68,131,132,133,56],{},"On a gaming laptop switch the vendor console to silent or power-saver mode, which also reduces heat. For heat see ",[52,134,136],{"href":135},"/post/24/","Computer Overheating and a Fan Running Constantly",[68,138,139],{},"Turn off allow wake timers so sleep is not interrupted and wastes power.",[68,141,142],{},"If plugged in long term, enable a charge threshold or maintenance mode so it does not sit at 100%.",[68,144,145],{},"External 4K displays or charging other devices drains extra power; unplug in mobile scenarios.",[68,147,148],{},"Keep system, BIOS, and GPU drivers updated; vendors often improve efficiency through updates.",[14,150,152],{"id":151},"battery-care-learn-it-before-it-breaks","Battery care, learn it before it breaks",[10,154,155],{},"Lithium batteries fear two things: being stored at full charge, and heat.",[98,157,158,161,164,167,170],{},[68,159,160],{},"Ideal range 20% to 80%. Do not charge to 100% every time or run it to automatic shutdown. For long-term plugged-in use, set a charge threshold or battery care mode to cap at 60% to 80% (Lenovo calls it care mode, ASUS battery health mode, Dell custom charge threshold). This significantly slows aging.",[68,162,163],{},"Avoid heat. Gaming while charging, or using it on your lap or under a blanket, raises temperature and permanently accelerates wear.",[68,165,166],{},"Do not store it empty long term. Keep a spare laptop around 50% and top it up once a month.",[68,168,169],{},"Do a full charge and discharge occasionally. Long-term shallow cycles drift the fuel gauge; once every month or two, charge to full and drain to about 10% to recalibrate. No need to do it often.",[68,171,172],{},"Swelling means stop using it immediately. A swollen battery is a fire risk; replace it through support.",[14,174,176],{"id":175},"when-to-replace-the-battery","When to replace the battery",[10,178,179],{},"Replace if any of these hold: full charge capacity below 30% to 40% of design, runtime dropped from a day to two hours, visible swelling, or the percentage suddenly drops or shuts down at a certain level. Use original or reliable third-party cells; do not buy cheap inferior ones.",[14,181,183],{"id":182},"what-drains-battery-even-in-sleep","What drains battery even in sleep",[10,185,186],{},"Even when closed, a laptop can lose charge if Bluetooth, Wi-Fi, or wake timers keep it partially active, or if a background app prevents deep sleep. In Settings > System > Power and Battery you can review per-app battery usage to find the culprit. If the machine gets warm in a bag, it is usually not truly sleeping; disable allow wake timers and check for a stuck updater. For older laptops, replacing the battery is often cheaper than a new machine, and a genuine cell restores most of the original runtime.",[14,188,190],{"id":189},"summary","Summary",[10,192,193],{},"For fast drain, check health first, then optimize settings. Brightness, background apps, the discrete GPU, and power mode are the four big savers. For care, hold the 20% to 80% range, avoid heat, and enable a charge threshold for long-term plugged-in use, and the battery lasts one or two extra years. Replace only when wear exceeds about a third.",{"title":34,"searchDepth":195,"depth":195,"links":196},2,[197,198,199,200,201,202,203],{"id":16,"depth":195,"text":17},{"id":59,"depth":195,"text":60},{"id":95,"depth":195,"text":96},{"id":151,"depth":195,"text":152},{"id":175,"depth":195,"text":176},{"id":182,"depth":195,"text":183},{"id":189,"depth":195,"text":190},"md",{},true,"/post/60",{"description":12},"post/60","eI8YVqWYj7HiyhNC4EGts6lFKFEAnMtxscJJVTZbQUE",1794378304128]