Does the power adapter have capacity?

Does the power adapter have capacity? The following is an introduction from three aspects, including the battery capacity is the key, on demand to choose the capacity, battery capacity does not match the charging method:

1. Battery capacity is the key

Battery capacity is usually expressed in mAh (milliampere-hour), and the larger the better. Before purchasing a portable Power Supply, you should also know the battery capacity of the device you are using, which can be roughly translated into the performance of the portable power supply. For example, the battery capacity of apple iPhone 5s is 1440mAh, and a mobile power supply with a capacity of 5600mAh can theoretically achieve about 3.8 charging times.

2. Select capacity as needed

For consumers who buy power adapters, they should try to choose to buy brand products through normal channels. If the products do not have brand and model, no manufacturer, no electrical parameter identification, no warning label, it is better not to buy. In addition also do not blindly pursue large capacity, when the purchase should also be carefully checked mobile power shell, poor quality mobile power product workmanship is relatively rough, the same type of shell, the higher the capacity, its weight is relatively heavy.

3. Charging method with mismatched battery capacity

On the premise of the same voltage, the best choice for a 40AH battery pack is of course a 40AH power adapter. If you only have a 20AH charger on hand, you can also use it. The constant current charging period is prolonged, which is not a big problem. In the following high constant voltage charging phase, the time of turning the lamp will be greatly delayed, resulting in the accumulation of battery heat and the increase of temperature. Due to the negative temperature effect of battery terminal voltage, the charging current will not gradually decrease, but become larger and larger, and the vicious cycle will lead to the thermal runaway state.
Of course, when the ambient temperature is not too high, the probability of heat loss is not high, but it can also enter the trickle charging state. In order to be safe, the thermal runaway can be avoided by limiting the charging time, improving the cooling conditions and intermittent charging.

Best regards,

Shirley Liang