Printable Battery Formula Sheet
This one-page battery reference sheet is for anyone estimating battery life from a load, a device current draw, or a battery capacity. It includes core formulas for energy in watt-hours, runtime in hours, and average current over active and sleep periods. It also lists common battery types with typical voltage and capacity ranges, including AA alkaline, AA NiMH, and CR2032.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 50 KB
Free for personal, family and classroom use.
Use it as a quick reference while planning a battery-powered project or checking a runtime estimate by hand. Keep it beside a calculator, spreadsheet, or design notes so you can convert mAh to Wh, compare battery options, and estimate how long a battery will last under a given load.
Good for
- Estimate runtime from battery capacity
- Convert mAh to watt-hours
- Compare common battery types
Tip: Print it on letter paper and keep it near your calculator for quick checks.
2 files · XLSX, PDF, DOCX
Get every sheet: Battery Runtime & Power Budget Workbook
This sheet plus 1 more in one download, with the editable Excel and Word files. Build a full power budget for a device, camper or off-grid setup: every load, its duty cycle and the battery size you need.
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Printable Power Budget Workbook