Ah I see. Makes sense then. I was like why is the battery draining rather quickly even charging the Switch.
Also I noticed something else when charging the Anker battery, not sure if this is normal. When the Anker battery is fully charged and I unplug it. When plugging it back for charge when it's fully charged already, why does it say it's charging again? The last LED light 90% blinks for a minute or 2 and then stops. I wait till all the LED lights stop blinking and I try it again. Plug it in for charge, and the 90% LED light blinks again. Then eventually stops blinking and all LED lights turn off. Normal?