Hi SerbanPopescu,
Unfortunately, we don't have a specific adapter for the power banks. All devices do have their own compatibility with the power source you are trying to charge the battery. We always recommend that you use the Surface Connect charger that came with your Surface for faster charging. If you use the USB-C port to charge your Surface, keep these things in mind:
- Surface devices will only charge with USB 2.0 or 3.0 compliant chargers. Chargers that provide 5 volts, 1.5 amps, or 7.5 watts can charge, but they’ll be so slow that they should be used only if there’s no other option. Low voltage USB A chargers with a USB A to USB-C cable won’t work at all.
- If the battery is drained, and the charger you’re using uses 60 watts or more, your Surface will instantly turn on when you plug it in. If you’re using a charger that uses less than 60 watts, your Surface must charge to 10% before it will turn on.
- For Surface Book without the NVIDIA GPU with the regular base, we recommend a charging power of 33 watts. For Surface Book with the NVIDIA GPU, we recommend 93 watts.
- For Surface Go, we recommend using a charger that provides 15 watts or more. If you use a charger that provides less than 12 watts, your battery might not charge if you’re doing things on your Surface that use more power (for example, watching videos or something similar). In this case, your battery level would go down.
- If you experience charging issues when using a USC-C port, seeFix USB-C problems.
It would be best to contact your power bank’s manufacturer and ask them for compatibility.
Hope this answers your question.