However, lithium batteries are not supposed to make noise. So if you begin to hear strange noises from your lithium battery then there is an underlying problem that needs to be addressed quickly. Hearing noise from your battery is dangerous as there can be a risk of fire or explosion.
A loud battery backup noise should concern you. Even though battery backups are not necessarily silent, the sounds they generate are not loud enough to disrupt your work. That doesn’t include ordinary alarms such as those designed to tell you that the battery is depleted.
Battery banks should be silent, save for a fan if it's a very large one. Any other noise means it's likely not functioning correctly, and has the potential to explode/go up in flames at any time, in use or not. Voltage converters and regulators can making a hissing sound which might change with what is plugged into it.
You can place it on concrete and perhaps call your local fire department. Voltage noise occurs when your battery suffers a short circuit. The increased voltage noise usually occurs when the metallic lithium anode and the heterogeneous discharge thereof.
But more often than not, a squealing sound is a sign that the battery backup is dead. Unless you have a way of confirming that the battery backup noise is simply coil whine, you should get a replacement. Naturally, you should first consult an expert. They will tell you whether you need to replace the entire unit or just the battery.
If your lithium-ion is making weird noises the best line of action is to replace the battery with a brand-new set. If the noise stops then the battery is the cause of the noise but if the hissing noise persists then it may be coming from your electronic device.
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