1. There are full charging mode and storage charging mode,Storage charging mode: The battery is best stored at 60% power for a long time. Storing the battery with full power is prone to bulging, and storing it without power may cause battery failure. The storage mode is to charge the battery with a power below 60% to 60% for long-term storage. 2. Digital display screen, the charging status is clear at a glance. 3. Mini 3 Pro's 2453mAh standard battery and 3850mAh extended battery can be at the same time 4. 4 ports can be at the same time 5. Applicable: For Mini 4 Pro, Mini 3, Mini 3 Pro battery and long-life battery Digital display charger: Battery port output: 8.5V/8.6 2.0A (MAX) x 4 USB port output: 5V/3A Charging time: Fully charge 4 batteries, 2453mAh about 70, 3850mAh about 110 minutes Charging temperature: 7-40 degrees Celsius Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC110V Colour:Black Material:ABS Package Contents: 1x Charger 1x Power cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.