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rob81 said:How can there not be one, there must be some way of doing it??
rob81 said:How can there not be one, there must be some way of doing it??
JimB said:There are integrated circuits which implement a "gas gauge" function for use in laptop batteries etc, try searching the Maxim website, I think they do one or two of these things.
Sceadwian said:If you've ever seen those built in battery gauges on AA's (I think Energizer and Duracell both did this for a time) when you press the side of the battery it shorts the battery across a thermal strip and the relative current through it causes it to heat up and show a charge state, same general concept.
Nigel Goodwin said:Have you ever taken a laptop battery apart?, there are often 8 or 9 SM IC's in them - pretty serious things!.
JimB said:If you want get a better indication of the charge in the battery you will have to integrate the charge/discharge current with respect to time. This is getting away from the idea of "simple".