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HP is issuing a voluntary recall after discovering faulty batteries inside a number of laptops. Though the recall only affects a small percentage of laptops (affected models shipped from December 2015 through December 2017), the batteries could potentially overheat, catch fire, and cause serious injury. A risk is a risk, so you'll definitely want to take action if you have one of the following laptops:
If you have one of these laptops, you'll need to download and run this battery validation tool. The whole process should take less than thirty seconds. If the tool identifies a problem, apply the BIOS update and enable battery safety mode. This runs the battery down and then it no longer charges. You can still use the laptop, but only when it's plugged into an HP power adapter.
Once you've made an appointment, HP will send a technician to your home or place of business to replace the battery at no cost. Unfortunately, you really need a professional to do this, as the battery is internal to the system and is inaccessible without the right tools or expertise. In other words, I wouldn't recommend going in and playing around with the internals, especially if you have one of the affected laptops.