Spam and advertising is not allowed and will result in a ban. You may be asked to repost using the form if your post is too vague. Please use the suggestion form seen above. Please post in /r/techsupport if you need technical support. Our Wiki (includes quick-pick suggestions, frequently asked questions, and advice on laptop hardware)įorm to use for posting suggestion threadįor any general questions, please check our Wiki before you make a post to help keep the sub uncluttered and organized. Do not over charge the battery: General rule is 4.Need help finding a laptop? Here are some links to help:.Work on a slightly charged battery: Keep batteries charged at less than 20% as they hold less energy, if something goes wrong, it has less energy for combustion.Words of warning when dealing with lithium batteries: even though the BMS circuit for the laptop battery pack is very good at protecting the cells inside, care must be taken when working with lithium batteries. Thus, wouldn't it be nice to have a way to use the battery directly without extracting the 18650 cells that are inside the pack?įortunately, there is an easy way to reuse the packs directly. The BMS also ensures that the batteries are well balanced. The laptop BMS typically will protect the battery from short circuiting, under charge, over charge and over heat conditions. Even though these old batteries can't power a laptop, there are still plenty of low power applications that are useful.Ī laptop battery pack integrates a battery management system(BMS) that ensures that the battery is kept safe even when the outside environment is unfriendly to the battery. For a high current load such as a laptop, the battery will start to fail as the charge level suddenly drop from 30% to 0%. The battery usually can still take the rated charge, but can't be charged or discharged quite as easily. One of the main mechanism lithium ion battery degrades is the internal impedance increases over time. Even though some of these batteries start to get old and have reduced ability to store charge, they are still useful for other projects. Almost inevitably, every hacker will start to collect a few batteries from old laptops.
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