2008 Ford escape won t start?

I got a new battery for my car and it cranked up all that day but not that night. I tried to crank it up and just the dash lights came on. I got it towed into my yard and was able to get in and gets things out of it. It sat there for about a month and now nothing happens. I have to use they key to manually unlock the door and absolutely nothing happens when I try to crank it up. No lights or sounds of any kind. The unlock button doesn t even work anymore. I tried to jump start it and got nothing. I did get sparks from the battery when I plugged the cables up to the battery. Is it the battery or something else

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