Battery Charge Time Calculator

Estimate battery charging time.

Charge time 2.4

Charge time 144

Formula: time = capacity ÷ current × 1.2 (losses)

Step-by-step with your numbers:

1. Values used:

2. Battery capacity = 3,000 mAh

3. Charge current = 1,500 mA

5. Charge time = 2.4

6. Charge time = 144

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Estimate how long a battery takes to charge.

The math behind it

time ≈ capacity ÷ charge current × 1.2 (the 1.2 covers charging inefficiency and taper).

3000 mAh ÷ 1500 mA → ~2.4 h.

Fast charging?

Higher current charges faster but generates more heat.