Battery & Energy
Runtime, series/parallel packs, capacity and energy conversions, charging, solar and consumption — everything you need to size and budget battery power. Eight complete tools, all live.
01
Battery Life Estimator
Runtime from capacity, current and efficiency.
Live 02Battery Series
Voltages add, capacity stays per battery.
Live 03Battery Parallel
Capacities add, voltage stays per battery.
Live 04Ah ↔ mAh Converter
Instant two‑way capacity conversion.
Live 05Wh ↔ kWh ↔ Joules
Three‑way energy conversion, live.
Live 06Charging Time
Theoretical vs real‑world charge time.
Live 07Solar → Battery
Charging time from panel, battery and sunlight.
Live 08Watt-hour Calculator
Energy from V, I and time — Wh, kWh, J.
Live