Macbook Pro Battery Needs Service/Not Lasting
My Macbook 2010 laptops battery is saying it needs to be serviced again for the third time in two years.
I already replaced it at the beginning of this year with similar symptoms on top of it not charging. This time its almost the same thing minus the charging situation.
The battery will not last longer then an hour if not 2 at the most, takes almost twice as long to charge. If I leave it for a week or two unplugged with the screen closed and sleeping, its dead when I go to try and use it again. The underside is also very hot even when the exhaust fan is running at full tilt.
What I can't seem to understand is that why I am having to replace the battery constantly. I also can't understand why a laptop in which was specified to have a battery life of up to 7 hours is only lasting an hour or two if that at the most. Plus should be able to last two years shut off and then when turned back on at least have 60% battery life left, not a dead battery.
Please help!
MacBook Pro, macOS Sierra (10.12.6)