In practice, store it in the refrigerator (not freezer) in a sealed bag after you discharge it to 40% of capacity as measured with the fuel gauge in your laptop. For a spare battery the ideal storage conditions are at a 40% charge at 0C (32F). The mechanism is an increase in internal resistance. Lithium-ion batteries start to deteriorate from the day they are manufactured. Two important things that I did not mention when we talked about batteries are aging and storage. Thanks again to Jerrold Foutz for contributing to this article. Unfortunately, not all designs are perfect and the layman hasĪlmost no way to judge the quality of the design. Good thing, too … my laptop is plugged in and running pretty muchįinally: “All this assumes a well designed power supply (including chargerĪnd battery). Pretty much expect that type of usage, so it’s not the issue I was afraid it Plugged in for extended periods of time would harm the battery. Repeatedly – say by leaving it in your car overnight in cold weather regularlyĬan also adversely impact the battery’s life.Ī concern that I’ve had for a long time is whether or not leaving a laptop Temperature cycling – allowing the laptop to become very cold and then warm, Wife and I actually each have a laptop desk from LapWorks. If you do like to use your laptop on your lap, there are various “laptopĭesks” out there that will provide you a flat, or even grooved surface (forĮven more space and air flow) on which to comfortably place your laptop. Shorten the lifespan of the laptop’s batteries.Īgain, in Jerry’s words: “If you have your laptop on your lap and it isīurning you, you are shorting the battery life and charge-cycle capabilityīecause you have interfered with its cooling system.” If youīlock that space, with say your lap, it’s likely that you’ll be causing the That creates very important space for ventilation. Likely, bumps or rubber pads) that lift it off of any flat surface you might Look at the bottom of your laptop you’ll see it probably has feet (or more The fact is that laptops just aren’t designed for … well, for laps.
The number two factor in battery life? Temperature. Minimizes any manufacturing differences that may occur over time. I’m also glad that I’ve purchased my batteries, extra batteries, andĬhargers from the manufacturer at the time I got my laptop. I had no idea that batteries were that sensitive. Increasing the charge voltage to 4.250,Ī difference of less than 1/4 of a volt, can reduce this down to less than 100 Performance.” An example Jerry shared is that a 4.1V cell charged at 4.050 V MV (millivolts, 1/1000 of a volt), you will also get less than optimum “If you get a low-cost charger and it is off by as little as 10
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