Changed battery now won't reconnect

Ok so ot the batt low via app. changed out the batt (i bought an extra ring batt) and now it will not reconnect. So to be honest the batt died before I got to change it out. What do I do? I've tried manually reconnecting (tells me my password is incorrect, which it is NOT), I've done a hard reset and same thing withthe password. I double check my password multiple times, even disconnect the wifi on my laptop and reconnected. My laptop works fine. So confussed please help.