Battery Life Calculator

Use this battery life calculator to estimate how long your battery will last based on its capacity and your device’s consumption rate. Whether you’re powering sensors, trackers, cameras, or other electronics, get a fast and reliable runtime estimate.

How Battery Life is Calculated

The basic formula is simple:

Battery Life (hours) = Capacity (mAh) / Load Current (mA)

If your device doesn’t consume power continuously, use the advanced mode to input duty cycles.

Tips for Accurate Estimation

• Always check device datasheets – standby and active current can differ greatly.
• Temperature affects battery performance. Results may vary.
• Reserve margin lets you avoid full discharge, increasing battery longevity.