Yeah, when all four lights are lit, it means the power bank has been fully charged. And the three lights means 75% power. And generally, it will take 5 hours to fully charge this power bank. Hope this info can help you.
High Capacity 10000mAh Mobile Power Charger: With 10000mAh capacity, UGREEN portable battery charger could repeatedly charge your phone or tablet without needing a power outlet, which is quite suitable for outdoor activities.
Super Light & Pocket Size: This portable charger only weights 187g, which is much lighter than normal bulky power bank. It's also just as small as a credit card, which is quite portable to carry in pocket or package.
Charge 2 Devices Simultaneously: This external portable battery pack can charge 2 devices with a total output of 2.4A at the same time, such as iPhone XR, iPad Pro 12.9", Samsung Galaxy S8 Type C Phones, Huawei Mate SE and more Apple or Android tablets and smartphones.
Fast Recharge with Pass-through Charging: The external power bank support two types of input, a micro USB port, and a type C port, which could be fully charged in 5 hours with a Micro USB cable or Type C cable (5V/2.4A USB wall charger is required). It also supports pass-through charging. There is no obstacle that you can play your device when the battery bank charging. This backup battery comes with multi-protection against overcurrent, overvoltage, overcharge, over discharge, overheating.
1. Input: Micro USB Port, Max.5V/2.4A
2. Type C input Output: USB Port1:1A; USB Port2: 2.1A
3. Battery Type: Lithium polymer battery
1. Please use 5V/2.4A wall charger to charge this power bank.
2. When charging 2 devices simultaneously, the battery charger will take priority to deliver the current to built-in lightning cable.
3. For charging Nintendo Switch, It can only power the console, NOT the Dock.
1 x 10000mAh Battery Pack
1 x Micro USB Cable
1 x User Manual