Yes, the biggest problem with Li-ion batteries is heat, which is produced by resistance during the charging process. The problem with laptops is usually that people use them while they're charging. Then the battery is subjected to a double dose of heat-one from the charging process & the other from the notebook being in use.
My 2nd-best advice for extending the life of Li-ion batteries in notebooks is, when the battery runs low and you want/need to continue using the notebook, plug it in & remove the battery. When you're done using the notebook, reinsert the battery (while leaving it plugged in) to recharge it.
My best advice doesn't extend the life of the actual battery, but does extend the life of the notebook-as a portable device and is *much* more convenient than the above, although it costs a little more. That's to buy an extra battery.
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