Battery Life Calculator – Estimate Your Battery Backup Time And Online 2025

PixFW — Battery Life Calculator

Battery Life Calculator

Estimate runtime from battery capacity (mAh), voltage and load current. Responsive & copy-friendly — PixFW

Results use: Capacity × DoD × Voltage → Wh

Notes: Capacity conversions: 1000 mAh = 1 Ah. Wh = (Ah × V). Runtime = Wh ÷ (Load Power). Efficiency reduces usable energy.

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