Is the Spotlight Cam Solar supposed to be used with two batteries? If so, why is only one supplied in the box?
It comes with only one. It can take two but does not come with two, you would have to purchase the other one.
Does it need two to batteries to operate? If so, why did the product come with only one battery?
No, it doesn’t. I imagine it has space for two batteries for those that don’t use the solar charger option and don’t want to have to take out and charge batteries as often or leave one battery in while you charge the second.
I’ve had mine for about a month and I’ve never seen the battery go below 97%. Of course, that’s with full bright sunlight, so it might be different when fall gets here and I have a lot cloudier days.