Qodosen sent me a note for my readers:
Many users feedback that DX-286 doesn’t come with batteries, which caused some trouble for users, this time we added new links to the included batteries on both Amazon and aliexpress.
1.https://www.amazon.com/dp/B0DF63Z54T
2.https://www.aliexpress.com/item/3256807498018650.html…
The above link contains 2 x 3350MAh high capacity batteries, which are guaranteed to be no less than 3350MAh, and have been tested to work for about 12~15 hours at 2/3 volume, but of course it depends on the content of the programme you are listening to, and the power consumption varies from programme to programme.
Not all the radios come with batteries, only the ones that say the have them, specifically the two links above have them.
The Amazon with 2 batteries costs $89.99 compared to the one with no batteries at $79.99. This is a very reasonable price for good quality batteries.