I'm not a mechanic and would like some guidance. we left my Mazda BT50 December 2019 to return to UK for three months. 20 months later we are in quarantine in Bangkok and will get to the truck toward the end of the month. I left it covered (that will be destroyed by now) an additional 10 lb psi in the tyres, a full tank of diesel and the battery disconnected. Battery is a now 2 1/2 years old so may need renewing.
My question is, other than getting the battery charged or renewed, should I do anything else before trying to start it?
Thank you in advance for any guidance received.