4400 mAh battery How many hours

To determine how many hours a 4400 mAh (milliampere-hour) battery will last, you need to know the ‌current consumption‌ of the device it powers (in milliamperes, mA). The formula is:

$Hours = Device Current Draw (mA) Battery Capacity (mAh)$

Example Scenarios:

‌Device draws 1000 mA (1A):‌
$1000 mA 4400 mAh = 4.4 hours$ .
‌Device draws 500 mA:‌
$500 4400 = 8.8 hours$ .
‌Device draws 200 mA (e.g., low-power sensor):‌
$200 4400 = 22 hours$ .

Key Notes:

‌Power Consumption in Watts?‌
If you know the device’s ‌power (W)‌ instead of current, factor in the battery voltage (e.g., 3.7V for most lithium-ion batteries):

$Hours = Power (W) \times 1000 Battery Capacity (mAh) \times Voltage (V)$
‌Real-World Factors:‌
Battery life varies with usage (e.g., screen brightness, apps running, network connectivity).
Power banks and batteries also have efficiency losses (~80-90% for typical devices).

Let me know your device’s current/power draw or use case for a precise estimate! 🔋