樹莓派鋰電源擴展板 雙USB輸出 Pi3獨立外場供電移動電源模組

商品說明

Raspberry Pi 樹莓派鋰電源擴展板 雙USB輸出 Pi3獨立外場供電移動電源模組

【性能參數：】

Lithium Battery Expansion Board for Raspberry Pi

Features

• Battery capacity: 3800mAh
• Maximum output current: 1.8A
• Output voltage: 5.1V ± 0.1V
• Standard charging current / voltage: 1.0A/5.0V
• It’s convenient to power on / off raspberry pi via battery swith;
• It can last about 9 hours if only pi 3.
• The Lithium battery expansion board can be also used on cellphone.

Note: You can still charge this battery even if the switch is turn off;

Working principle

• The working PMU (Power Manage Unit)can be only worked for charging mode or step-up mode at the same time.
• If the USB-A interface without any external load (like Pi), with 5V input voltage of MicroUSB, then the PMU enter charging mode. The PMU will integrate a current-limiting resistor with the external voltage, 5V voltage for Lithium battery, around 4.6V-4.7V voltage for USB-A interface.(The “ON” LED lights )
• The PMU would enter step-up mode without external 5V voltage. Under this circumstance, turn on the switch, USB-A interface can output maxmum 5V voltage, two USB-A interface can maxmum output 1.8A current. The PMU itself has current-limiting protection. it will be short circuit when over 1.9A current.