Sears prairie mower won't keep hold of battery-operated charged? I thought it was the battery so I bought a unknown one....

I thought it was the battery so I bought a unknown one. Now new battery is unresponsive. Can anyone tell me what might be the problem?
Is near a approach to clip on storm...
Answers:    Are you leaving the push button in the machine? Sometimes society do that and forget to turn the unit completely off. Another request for information, does the fresh battery start the mower quickly? If so look to your alternator.
Help! Tried to unscrew lightbulb, but bottom metal...
Assuming the replacement battery-operated was good when you bought it (you have it tested, right?) the only other expl is that an improper ground is shorting out the electrical system. Look for a tiny loose chain touching somewhere where it should not.
Air Conditioning Not Cooling House?
Something is draining the battery,it sounds approaching a short somewhere,be sure the alt belt is tight also.Call a small engine repair shop and explain this to a tech,he may have the best answer to this.