August 1, 2018How to maintain the interchangeable plug power adapter?Interchangeable plug power adapter is common in our real life, which is used for language repeater and Walkman etc. These electrical appliances c...view
June 26, 2018Charging process1. The LED on the circuit board does not light when the power is not connected2. If power is connected to the circuit board, the green LED is on, and the circuit board waits for the li...view
August 1, 2018The power supplyBefore using, make sure the power supply voltage is 220V and 50Hz. Use special socket as far as possible, must not use a perforated socket, and make sure the socket has ground treatmen...view
December 25, 2017Power adapter first appeared in the mid 1980s. Japanese Toshiba, first used the switching power supply technology in external power supply for laptop. It started a new page in the history of power ada...view
June 26, 2018Lithium battery charging current and charging voltage are the two most important parameters in lithium battery charging. This is not only related to the charging performance of lithium batteries but a...view
August 1, 2018A 21v charger is judged by the battery voltage level, so how does the 21v charger automatically detect the battery voltage during charging? For example, to detect the battery voltage, we need to open ...view