Request for hardware startup: a battery charge level indicator part under $5 (for both rechargeable sand non). and I had a brief slack discussion (see screenshots) on why this is a hard problem that’s important and useful to solve. Any bright ideas?
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So is the idea to have an external battery level device (that perhaps know the type of device, or more you're wondering why they don't do this? I'm unsure who to add on this, but , , , might know.
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Not external. A part that can be integrated into any product design that outputs to an led or something.
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Also, I think it's less the hardware cost and more needing to do expensive / long term studies on battery degradation which is a full system problem, eg: "This particular motor current spikes more which degrades the battery faster, hence the indicator is inaccurate / erratic."
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But surely a rough, conservative 0/1 “low battery” warning indicator would require much less precision?
Choose from a dozen typical load profiles like “spiky”, “smooth” etc and hard-set during design.
I’m surprised there’s basically nothing for sub-smartphone class devices.
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