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Really good idea, fair play to everyone working on it. I generally try to keep my phone as long as possible but the main driver to make me get new phone is the diminishing battery capacity. This isn't helped by the fact it is very hard to get a replacement battery shipped to where I live.

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If you control the OS and hardware drivers on your device, you can preserve its battery capacity substantially by keeping its state-of-charge around 50% as far as practicable (keeping it from reaching not just "lows" which you should always do, but "highs" as well). We aren't even close to reaching the full amount of battery optimization that's possible on mobile.

I wonder how that advice applies if the battery capacity has already degraded significantly. For example, my current laptop's battery reports itself to be "100% charged" at 60% of its original capacity. Should I keep it around 30%? I don't really know enough about battery chemistry to understand how high levels of charge cause damage.

No, keep it hovering around 50% as much as you can, provided that it never ever reaches really low states of charge, 15% or less. State of charge is always relative to the capacity at current time, not the original factory capacity.

That's very interesting, can I read more about this somewhere?

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