Suspect replacement battery is faulty

Hi,

I suspect that the replacement battery I ordered is faulty. I carefully followed the guide to change the battery and all seemed to be ok. However, when attempting to power on the iPad again, nothing happened, it was completely dead !?

Thinking I possibly had damaged the iPad in some way I changed back to the original battery but found that this still worked fine and also showed it was charging ok with the adapter.

I again changed back to the replacement battery and left charging overnight. However, this has made no difference.

Is there anything else I should do ? It does seem like it's a faulty replacement ?

Thanks,

Richard