It was awhile ago, but I think the first one made it to a Munar orbit, but I ran out of fuel while adjusting the orbit to be polar, so decided to shave off some weight for the 2nd attempt. I think I picked up most of the equatorial biomes on the first go, thus didn't feel I needed as many batteries on the 2nd.
Hehe...yeah, I think that's right. Looking at what I currently have in orbit around the Mun, the one highlighted is the probe from the first screenshot, the one on a polar orbit is the 2nd from the screenshot above: