๐งฎ Coin cell battery life calculator (deep sleep)
Pick a coin-cell type, set active current, wake time, wake interval and sleep current, and watch the SVG coin-cell fill drain and the pulse waveform update live. Flags brownout risk when active current exceeds the cell's pulse rating. Shows runtime in the friendliest unit โ days, months or years โ capped at the 10-year shelf life.
