Charging USB devices with Gratnells PowerTray

PowerTray is a useful addition to any classroom where iPads or other tablets are regularly used. Thanks to intelligent charging technology, every one of the 10 charging ports delivers an optimum charge to each device.

This quick Q&A shows how your PowerTray can work with a variety of devices.

Can I use PowerTray to charge USB-C devices?

PowerTray will charge many USB-C devices. PowerTray ports are USB Standard-A type ports so your cable will need to be USB-C to USB, meaning the cable will look like this at each end:


My cable is USB-C to USB-C. Can I use PowerTray?

PowerTray does not support USB-C to USB-C type cables. However, USB-C female to USB male adapters are widely available. Use this type of adapter to make your device compatible with PowerTray charging.


I use Apple devices with lightning cables. Are they PowerTray compatible?

You can charge iPhones and iPads with PowerTray but you may need an alternative cable or an adapter. If you have a USB to Lightning cable then you are good to go. However, if your cable is USB-C to Lightning you will need to use either a USB to Lightning cable or a USB-C female to USB male adapter. It is unlikely that you can charge a laptop device this way.




Can I use PowerTray to charge Chromebook devices?

The answer here depends entirely on the model of Chromebook but firstly, if your Chromebook has a USB-C port, it must be charge compatible.

Each port on the PowerTray supplies a DC output of 5.0V / 2.4A maximum per port. This equates to 12 watts. For some Chromebooks, this will be sufficient to trickle charge the device over several hours if in low power mode or switched off. However, for some models this amount of charge will be insufficient. Check your Chromebook specifications for the minimum charge requirements.