Hello & Welcome to Just Answer,
Sorry to hear of any trouble you are having with your new device.
Based on your questions, may I ask if this is the first Garmin device you have owned or used?
Can I also assume that you have NOT found the FULL manual for this device yet (online)? If not, let me give you a link to the electronic (PDF) version of that manual.
Click here --> FULL Manual
Please let me know if this is your first Garmin device and if you have any trouble getting and viewing that manual.
NOTE: You will NOT want to take apart the battery pack, as you should find a "battery type setting" in the manual (either full or the quick guide), that will allow you to charge the battery while it is inside the device.
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)