The utilization rate of the power supply in the charging treasure is only about 60%, and 1200 MA can charge about 720 mA. Mini power supply 1A output boost conversion rate, rarely more than 0.85. From the power of the charging treasure to the effective power of the mobile phone battery, it also goes through the charging line, the mobile phone charging system, the loss of the two sets of connectors and the loss of the internal resistance of the mobile phone battery.
Mini mobile power can be converted to the actual utilization rate of mobile phone batteries, only about 60%. Therefore, a sufficient amount of 1200mah mobile power supply can only charge the phone with about 720mah of electricity.
Charging a small capacity of smart phones such as Apple 4, the battery capacity of 1430mah, can only be half full. Charging traditional mobile phone 1000mah, charging current is small.