How do you tell if the nyko power pak is full charged when the 3ds battery meter icon says it isn't?

To determine if the Nyko Power Pak is fully charged when the 3DS battery meter indicates otherwise, check the Power Pak's LED indicator. If the LED is green, the Power Pak is fully charged; if it’s red, it is still charging. Additionally, try disconnecting and reconnecting the power source to see if the battery meter updates, as sometimes the system may not accurately reflect the Power Pak's charge status until it is reset. If the Power Pak continues to show a low charge despite the LED indicating otherwise, it may need to be calibrated or checked for issues.