Ni-MH battery charging time calculation

Perhaps you may have a universal right is very concerned about the battery issue is how long the battery should be considered sufficiently full? Many of my friends are worried that lack of time, lack of battery power, but also may shorten battery life, time is too long, they may damage cellular phones and battery. Thus, we should demand more than enough time? Introduce here a simple calculation:

The overall size of the battery capacity is indicated on the battery mA as a unit, plus the highest value of capacity.

For example: battery capacity is 1200mAh indicated milliampere 1200. Meanwhile, Charger generally marked by the current load, uses the same units of mA.

In this way, the duration of the battery can be simply calculated using the following formula: the battery capacity divided by the load current, then multiplied by a factor of 1.2 (1.1), Units every few hours. For example: the battery capacity of 1200 mA charge current of 600 mA BP-511 charger, charging time is (1200 mA / 600 mA) × 1.2 = 2.4 hours, then use that piece of the battery charger charging time for 2.4 hours.

The above calculation does not apply to a new battery. In general, the new battery before charging three times, including nickel, cadmium batteries and nickel-metal hydride batteries, the standard rate in 15 hours (0.1C) to allow the use of time achieve maximum battery. After the fire of the above method may be the charge time.

Charger charging current is scored on how many?

Can you give a simple formula: the time to charge and discharge (minutes) * 1.1 = Capacity / Current (mA) * 60

Charging time and battery charge current to charge the battery capacity divided by the current, charging time, given the losses while charging, so that the charging time will be calculated and multiplied by 1.1 or 1.2 of this constant.

According to the ID, you can calculate a difficult period. If the charger is normal, and the current is very low, then the charging time must be very long.