Estimated equivalent active use
7.5 hours
Runtime changes substantially with workload and signalHow this calculator helps
Translate milliamp-hours into a rough runtime using average device current and a usable-capacity allowance. Testing several power-draw assumptions gives a more honest range than comparing battery capacity alone.
How to use it
- 1
Enter rated battery capacity from reliable specifications.
- 2
Use an average current based on a similar measured workload.
- 3
Set a usable percentage that allows for conversion loss and battery condition.
Formula and methodology
Estimated runtime = battery capacity ร usable percentage รท average current draw.
Worked calculation example
A 5,000 mAh battery at 90% usable capacity and an average 600 mA load gives about 7.5 hours of equivalent active use.
What can affect the result?
Network signal
Weak mobile signal can raise modem power consumption.
Display demand
Brightness, resolution and refresh rate strongly affect runtime.
Battery ageing
Usable capacity normally declines with age, heat and charging cycles.
Limits of this estimate
A constant-current estimate cannot reproduce changing workloads, standby drain, modem conditions, temperature, battery management or laboratory endurance tests.
Frequently asked questions
Is the mobile battery life estimator free?๏ผ
Yes. SolvePilot tools are free, work in your browser, and require no account.
Does SolvePilot store my values?๏ผ
No. Calculations run locally in your browser and the values you enter are not sent to a server.
Should I treat the result as an exact bill or quotation?๏ผ
No. Results are informed estimates. Final charges can vary because of taxes, tariffs, lender terms, usage patterns, or provider rules.
How can I improve the accuracy?๏ผ
Use recent values from your own bill, statement or institution, review every assumption, and confirm important results with the relevant official source.
Why can two 5,000 mAh phones last differently?๏ผ
Chipset efficiency, signal strength, display, refresh rate, software and usage patterns can create large differences.