We haven't used this Walkie Model 101T-F40L in years and the battery is dead. It's 24 volt btw, Unfortunately, it is not obvious how to change this other then to spend $2400 with a local material handling supplier.

I understand that it takes 4- 6 volt marine batteries but we can't figure out to get the cover off and inside to see. There is nothing in the documentation other then to say to read the manual that comes with the battery charger. I don't have anything on that. Their is a Champion logo on the cover and a label that says Pow'r Pak' however

Any ideas or comments would be appreciated