Pevlika Browser Apps

Battery Life Calculator

How long a battery lasts at a given load.

Runs in your browser — nothing is uploaded
Accounts for cut-off voltage, temperature and ageing.

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For learning, hobby and prototyping use. Not professional electrical design advice — follow applicable codes and standards.

How to use Battery Life Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

Runtime (h) = capacity (mAh) × usable % ÷ load (mA)

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