Fast draining battery

Ugh, I got a new battery installed in my mid-2010 MacBook Pro, High Sierra, 2.66GHZ i7 intel core, 4GB ram, last June. Last night, I shut down everything that was open, put it on sleep, and charged it. As soon as I began using it today, the battery is draining like 1% every minute. I know this isn't normal. The battery that was installed was supposed to be new. It's a Newer Tech battery.

Previously, I would shut down the computer when not in use. Then I read that I should just put it on sleep, as shutting it down and powering back up is too taxing. So I've been putting it on sleep whenever I'm not using it (when I'm sleeping).

Totally stressed out about this. What could have happened overnight to cause this issue?