New macbook battery not working?

A couple days a go my macbook had a message saying 'service battery' so it needed to be replaced, i bought a brand new battery for it (my macbook is a mid 2010, Model A1342) i replaced the battery and plugged in the adapter, a couple hours later i turned it on, i took out the adaptor and it turned off, when... show more A couple days a go my macbook had a message saying 'service battery' so it needed to be replaced, i bought a brand new battery for it (my macbook is a mid 2010, Model A1342) i replaced the battery and plugged in the adapter, a couple hours later i turned it on, i took out the adaptor and it turned off, when i clicked on the battery button it says battery not charging and the power source is the charging adaptor, so my macbook only works if i plug the charger in.
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