Please help me decide if this battery is ok, I need help!

Shadow Catcher wrote:
How long has it sat with out being charged It could be very dead. It is NOT a true deep cycle battery and it will not function as such. Batteries need to match or they will fall to the weaker of the two.

I just got a picture of the top of the battery, there's a H5 sticker so august 2015, so around 5 months on the shelf at walmart before she picked it up a month ago in January = 6 months unused uncharged, what will my voltmeter read?