Battery runtime calculator
Estimate approximate battery runtime from Ah capacity, voltage, and load by power (W) or current (A). Results are indicative only.
How to use
1. Enter battery capacity (Ah) and voltage.
2. Choose power or current input mode.
3. Enter load draw.
4. Read estimated runtime — approximate only.
Example
Battery runtime calculator
Estimate approximate battery runtime from Ah capacity, voltage, and load by power (W) or current (A). Results are indicative only.
When to use
• When you need a quick estimate without spreadsheets.
• When you want privacy — calculations stay on your device.