Update - just a few weeks into my initial check the battery only lasted about half the time it had a few weeks ago. Very annoying! DO NOT BUY THIS BATTERY! Initial Rating - Like - Easy enough to install if you pay attention to how your current battery is installed when you remove it. Dislikes - only sucks 2 times and no longer holds charge long enough to suck my whole house like the original Shark battery. A full charge takes several hours.