mirror of https://github.com/espruino/BangleApps
13 lines
991 B
Markdown
13 lines
991 B
Markdown
# Charge Gently
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Charging Li-ion batteries to their full capacity has a significant impact on their lifespan. If possible, it is good practice to charge more often, but only to a certain lower capacity.
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The first stage of charging Li-ion ends at ~80% capacity when the charge voltage reaches its peak*. When that happens, the watch will buzz twice every 30s to remind you to disconnect the watch.
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This app has no UI and no configuration. To disable the app, you have to uninstall it.
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Side notes
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- Full capacity is reached after charge current drops to an insignificant level. This is quite some time after charge voltage reached its peak / `E.getBattery()` returns 100.
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- This app starts buzzing some time after `E.getBattery()` returns 100 (~15min on my watch), and at least 5min after the peak to account for noise.
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\* according to https://batteryuniversity.com/article/bu-409-charging-lithium-ion assuming similar characteristics and readouts from pin `D30` approximate charge voltage |