[Is it correct charge for "Pineapple Juice 12800"]

How do I know that the battery is fully charge?

[Is it correct charge for "Pineapple Juice 12800"]

Just to ensure that the battery is working properly. After charging for almost an 1.5 hours. I have unplugped it from charging adapter.
Then turn the switch of the battery on, but it doesn't show any light on the swith at all.
Does this mean the battery is dead?

Note:
- The temperature of the battery's surface is still the same not even warmmer at all.

- The shape of the battery is very weird. There is a little curve at the middle as you can see from the picture. It doesn't well align with the edge of the paper.

[Is it correct charge for "Pineapple Juice 12800"]

I just found the correct adapter in the box. However once I connected to the battery and plugged into the power outlet it was produced the strange noise and LED was dimming and finally the green LED was gone. Seems like my adapter already dead. The LED (at the battery switch) is no longer show red light any more.

But just now I found another adapter in my house with the output 12V . I am not sure whether it would work as replacement or not.
During the charging process should I turn the battery switch on?

[Is it correct charge for "Pineapple Juice 12800"]

Is this how it suppose to be charged? How long do I need to charge? I have leave it for more than 5 hours but it still doesn't feed any power to my pineapple once plug into it.

[Is it correct charge for "Pineapple Juice 12800"]

Do I got the correct charger? All I got from the box was this adapter (the same one I used with Pineapple).

Seems like it doesn't charge my battery at all even leaving charged for several hours.