Bit of basic (hopefully) mechanical help required!

Hi there, i’ve got a single cylinder Royal Enfield, recently had a full service, and after 10 days sat in the garage has died. I’m pretty sure it’s the battery as it makes attempts to start, then fizzles out. They are pretty simple bikes mechanically - but I was hoping on using it this weekend. If anyone fancies coming and taking a look, i’ll pay them 50 quid if they can sort it. It might just need a new battery, which I will buy if so, but just want to be sure.

PM me if you can help, i’d really appreciate it!