Battery Life Calculator
Calculate battery runtime based on capacity and load. Estimate how long your device will run on battery power.
How to Calculate Battery Life
- 1 Select calculation type (runtime, capacity, or discharge rate)
- 2 Enter battery capacity and voltage
- 3 Input the load current or power consumption
- 4 Set efficiency and depth of discharge percentages
- 5 View estimated runtime and energy calculations
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1