Battery Charge Calculator

Battery Charger Calculator

Battery Charger Calculator

Output

About Battery Charger Calculator

The Battery Charger Calculator helps estimate the maximum time required to fully charge a battery based on its capacity and charging current.
This is crucial for designing efficient charging circuits and ensuring optimal battery performance.

Formula

The charging time is calculated as:

$$ MTFC = \frac{(BC / CRC) \times 10}{10} $$

Considering efficiency losses, the charging time increases:

  • 10% efficiency loss: $$ MTFC_{10\%} = \frac{(BC / CRC) \times 11}{10} $$
  • 20% efficiency loss: $$ MTFC_{20\%} = \frac{(BC / CRC) \times 12}{10} $$
  • 30% efficiency loss: $$ MTFC_{30\%} = \frac{(BC / CRC) \times 13}{10} $$
  • 40% efficiency loss: $$ MTFC_{40\%} = \frac{(BC / CRC) \times 14}{10} $$

Where:

  • MTFC: Maximum Time to Full Charge (hours)
  • BC: Battery Capacity (Ah)
  • CRC: Charge Rate Current (A)

Example Calculations

Example 1

  • Battery Capacity (BC): 2000 mAh = 2 Ah
  • Charge Rate Current (CRC): 1 A

Using the formula:

$$ MTFC = \frac{(2 / 1) \times 10}{10} $$

Result: $$ MTFC = 2 \text{ hours} $$

With 10% efficiency loss:

$$ MTFC_{10\%} = \frac{(2 / 1) \times 11}{10} = 2.2 \text{ hours} $$

Example 2

  • Battery Capacity (BC): 5 Ah
  • Charge Rate Current (CRC): 2 A

Using the formula:

$$ MTFC = \frac{(5 / 2) \times 10}{10} $$

Result: $$ MTFC = 2.5 \text{ hours} $$

With 30% efficiency loss:

$$ MTFC_{30\%} = \frac{(5 / 2) \times 13}{10} = 3.25 \text{ hours} $$

Example 3

  • Battery Capacity (BC): 1500 mAh = 1.5 Ah
  • Charge Rate Current (CRC): 0.5 A

Using the formula:

$$ MTFC = \frac{(1.5 / 0.5) \times 10}{10} $$

Result: $$ MTFC = 3 \text{ hours} $$

With 40% efficiency loss:

$$ MTFC_{40\%} = \frac{(1.5 / 0.5) \times 14}{10} = 4.2 \text{ hours} $$