Hey no need to feel embarrassed, we all started out knowing pretty much nothing and I still feel like there are whole areas on pleo that I know nothing about

If you hang out on the forum long enough eventually some knowledge will rub off
As for your pleos issue I'm not convinced that it is a battery issue but I'm not experienced enough with these things to be bale to say for sure.
There are some really great batteries for ugobe pleos - the egg charger and battery - which will give you about 2 to 2 1/2 hours playtime from your pleo depending on how active he is. They don't die like the old green ones do as they are made of different stuff. They work great and I'd highly recommend them. They are all I use in my guys now

You can buy them from the stores here on the forums from Nova's Necessities - take a look in the stores tab at the top of the page under the shout box. Or try looking on ebay as there are a few sellers there too. Depending on what country you live in it is worth looking at both options to compare shipping costs.
I would wait till we resolve this issue first though or at least until someone else more cluey than me can give you some advice on the issue.
I'm not convinced it is your batteries causing the problem but I don't know enough to about these things to be able to say one way or the other. I think we have managed to gather enough info between us though for someone with a little more knowledge and experience to be able to help you out.

So now you just have to wait for the right person to come along. I'm thinking IMR or Crewella or one of the other long term members from the forum should be able to help. Keep your chin up till then