This is what I would do ,, and it ,would be a good process. Try changing the battery your self. one of 2 things will happen it leaks and yo need a new puter or it works. Either way start looking for a newer one that will resolve the negative issues you have with the one you have. my big thing is logical simple menu large buttons and a large screen. you may have other priorities to consider.My reason is my current computer is not very user friendly to me. I still go to various dive vacations. Just got back from Cuba and probably the DR in a few months.
I have never really liked the computer I have.