I successfully created a Smart Home Skill for a cordless, battery operated device. I allow the user to query for the battery level. This works well.
I now would like to include in Alexa's response the information about how long it would take to charge the device to 100% but I am not sure how to do that, in fact I believe it might not be possible at this point.
Possible Question: What is the battery charge of my device?
Desired answer from Alexa should be: The battery charge is 60%, the device is charging and it will take about 35 minutes to be fully charged.
So, I totally could add both facts to the device model, e.g. isCharging=[true|false] and chargingTimeEstimateInMins=int and allow Alexa to access this information. But I am not sure how to have Alexa come back with all values in one answer.
Any ideas or would I have to explore creating a custom skill?