What you can ensure however is to keep your laptop in a relatively cool environment as this will reduce both battery consumption and in turn battery wear.For a better experience, please enable JavaScript in your browser before proceeding.
Energy Management Lenovo Laptop Software That CanLuckily there is also calibrating option in that software that can calibrate the battery and make it right.Since you cannot remove the battery from the Z400 laptop, it is best to only allow it to charge up to 60 and leave it alone.The energy management software is purposely only allowing the battery to charge to 60 to help prolong the life of the battery. The reason is because as the battery is charged near its maximum capacity a chemical reaction start to occur. The high charge causes something referred to a lithium ion plating. Lithium ions is allows the battery to hold a charge however, when the charge is too high the lithium ions starts to clump together to form lithium ion plates. ![]() The result is that the battery life will begin to drop and the more the battery is kept near a full charge, the faster the battery life will decrease. When you know you are going to be using the laptop away from the AC outlet, then at that point you manually override the energy management software to allow the battery to be charged to 100. When you return home and plug the laptop to the AC outlet again for a long time, then allow the laptop to charge to only 60. The calibration issue you are having seems to only be a side affect of the energy management itself. Yes, it sounds like it is annoying, but the flip side is that it prolongs the useful life of the battery so just allow the battery to charge to 60. Simply consider it as a maintenance you must do one every couple of months. The IdeaPad Z400 is known to have poor battery life even when new so 2 - 3 hours of battery life on a full charge sounds about right; depending on what you are doing. Keeping it plugged in while using should actually increase your battery life in the long run. All batteries life span depends on the number of times it is discharged and recharged, so if you are putting it through more cycles of recharging and discharging by using it on battery frequently, it will degrade faster. While i agree it is better to keep the charge at around 75 - 80 and discharging it to 40, this gives you a very narrow window to work, is impractical and becomes an irritant. ![]() But what they do not mention consider is that a 100 battery will give more work hours than the 70 charged one and thus you will have to charge it lesser number of times for the same amount of work. And more recharge and discharge cycles with the 70 means lesser life span. Also, consumer grade batteries show asymmetric calibration and discharging from 100 to 70 (30 discharge) than 70 to 40 (same 30 discharge), as you must have noticed in laptops to cellphones. So, the 100 battery will provide you with even more work hours than a linear discharge model would suggest.
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