Macbook Pro battery storage failing
My Macbook Pro (late 2012) battery storage is failing. When the battery indicates around 45% (and also lower percentages), the Macbook switches off completely indicating the large red empty battery icon on a black screen.
I have to go to the mains charger, and plug it in, then switch Macbook back on and battery indicator indicates the remaining amount (which can still be for example, 45%). Once switched back on, the Macbook is then taken off mains to continue on the battery power.
After only only light but regular use a not yet three year period, I am severely let down by Apple as this product looks as though it will require the purchase of a new battery - which no doubt will be very expensive.
Does anyone have any comments or suggestions on this issue please?
Thanks
MacBook Pro with Retina display, OS X Yosemite (10.10.2)