First what is the MagSafe charger LED telling you? Amber, Green or not lit at all.
Where did you buy the battery? And what the system working at all before you started.
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If you are able to get it to start install this gem of an App [https://www.coconut-flavour.com/coconutbattery/https://www.coconut-flavour.com/coconutbattery/|CoconutBattery] it will allow you a bit more information than the OS offers. If you can post a snapshot of the apps main window here for us to see as well.
First what is the MagSafe charger LED telling you? Amber, Green or not lit at all.
Where did you buy the battery? And what the system working at all before you started.