The 2 middle green lights for charging are on constant andcan't charge or use.  Is there a way to reset the battery?

Are you able to power on your Spark with that battery installed?

May I know if the issue started after firmware upgrade? The middle two indicators light up, indicating that the firmware update fails. In this case, update the firmware again via APP.  When you put it in to the drone, can you still turn it on? Can you provide a short video showing the issue so that I can check it on my end. You can upload it by using google-drive or Dropbox and provide the link here. Thanks for your support.