How do electronics know what battery percentage they have?
In: Technology
I actually work with batteries for a living. A basic concept with any batteries is “nominal voltage”. Say you have a 12V car battery; A fully charged car battery isnt actually 12V but more like 12.6V. If a car battery is at 12V or below its essentially “dead”. Lower voltages than the nominal 12V would mean something severe happened to the battery, like a dry cell, or cold damage.
The same goes for phones and many electronics. Many rechargeable lithium ion batteries have 3.7V nominal voltage. This means a fully charged battery will naturally be a small bit higher. So a 3.7V nominal battery at 3.8V would tell me it has a bit of charge on it still.
If anyone has any questions feel free to ask, ill try to answer the best i can!
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