Just a tip.
It’s hard finding these laptop batteries new locally but it’s also hard finding them used. I usually buy them brand new from eBay and the prices rage depending if you want an OEM (Original Equipment Manufacturer) battery or third party battery. Obviously the third party batteries are cheaper and work the just fine, but the difference is that it will not have your laptop’s manufacturer’s name on it like Dell, SONY, HP, etc…I recommend getting a brand new third party battery from eBay because it will be new, cheap, and you won’t spend time looking for one locally. But again if you are willing to wait for a local one than by all means look around but it will be hard finding the specific model you need.
To help you look faster this is the information you will need to make sure you get the right battery for your laptop: Dell Inspiron 1100 1150 5100 5150 Battery Type U1223