Matty, I presume the main battery is fully charged, if you're not sure, can you tell us what kind of battery it is, or describe it. Is there any chance that the battery is old or neglected ie not been charged for a long time.
If all this stuff is new to you, we can talk you through the basics. A picture or two of the insides of the model will help as well. Touch the 'all topics' button on this web site, and you'll see a section at the top about how to post pictures.
It might save you a lot of heartache if we can confirm or eleminate what we think of as the basics, before you go to a lot of trouble.
Chas.