# Power supply can cause slow Homey Pro 2023 **URL:** \ **Category:** Questions & Help\ **Tags:** homey-pro-2023\ **Created:** [March 23, 2023, 4:22pm UTC](https://community.homey.app/t/power-supply-can-cause-slow-homey-pro-2023/78279 "2023-03-23T16:22:42Z")\ **Posts on this page:** 1\ **Showing post:** 137
**Author:** ![Dijker](https://avatars.discourse-cdn.com/v4/letter/d/b9bd4f/32.png) [@Dijker](https://community.homey.app/u/Dijker)\ **Post date:** [May 2, 2023, 3:31pm UTC](https://community.homey.app/t/power-supply-can-cause-slow-homey-pro-2023/78279/137 "2023-05-02T15:31:57Z")
> [@kaylestoinis](#): > > Do you guys think that a power supply that follows the Power Delivery or Quickcharge specification (with at least 15W) should Should work with dumb 5.00 Volt, so imho are a bad choice. > [@\[Info\] USB Power Supplies and cables (for Homey Pro Early 2023)](https://community.homey.app/t/info-usb-power-supplies-and-cables-for-homey-pro-early-2023/78431/1): > > Real USB-C Power adapters (for Laptops, telephones etc.) communicate with the device to negotiate a higher voltage (9, 15 or even 20 Volt) to speed up Charging. Homey doesn’t use that. > [@\[Info\] USB Power Supplies and cables (for Homey Pro Early 2023)](https://community.homey.app/t/info-usb-power-supplies-and-cables-for-homey-pro-early-2023/78431/1): > > - ❌ Most USB-C adapters stick with ~ 5.0 Volt, you can probably skip them. > - Most USB-A adapters have a slight higher voltage, around 5.1 to 5.2 Volt. > - Most USB (-A) Adapters have a lower voltage without load (eg 4.88V) and raise if you plug in Homey to fe 5.10 or 5.20 Volt. These look better (Also older adapters) > - Some Adapters with USB-C & USB-A or Adapters with USB-A 2100mA and USB-A QC perform better with the dump USB-A as it often had a slight higher voltage. --- _[View the full topic](https://community.homey.app/t/power-supply-can-cause-slow-homey-pro-2023/78279)._