I just ordered these:

https://www.amazon.com/MELASTA-Rechargeable-Batteries-2600mWh-Battery/dp/B07YJPQ2B2/ref=sr_1_7?crid=VZSHZ0QY5CXT&dchild=1&keywords=nizn+aa+rechargeable+batteries&qid=1585774076&sprefix=NIZN+%2Celectronics%2C172&sr=8-7

I'll let ya know after I give them a full working out. I just got my Odyssey+ yesterday though, so I am just getting my feet wet

You can use regular alkaline batteries, the 1.5v thing is only if you want rechargeables.

I bought these.

But I found this on Canadian AmazonI found this on Amazon CA.