Unfortunately, we do not have any personal user experience with this product, but I am happy to forward your question to the Community, perhaps a Community member can help you.
Hello Enios
The lamp is charged with a special plug (you can see this on the packaging in the 2nd picture) the other end is USB Type A. At least that is the case with my product. At least that is the case with my product, I bought it about 1.5 years ago.
When the battery is full, the light runs at dimmer level for 3 days. The lamp doesn't have a timer in it, it just runs through.
We love this lamp because it is dimmable.