Hi All
Back after 30 years and 'woah' whats been going on!! One of the challenges was trying to get my head around batteries and chargers. You guys and girls have been a great help and I also found the below link supporting and adding to you advise.
Thanks you all, I will need you help further down the line I am sure of that, my K2 is just a roller at the moment , being stripped and checked.
https://rogershobbycenter.com/lipoguide/
Lee