How can I tell if the Hotspot Blanket is fully charged? – Fatboy

For the Hotspot Blanket 2.0 (with on/off button on the back of the Fatboy label):

Make sure the Hotspot is on by pressing the on/off button on the back of the Fatboy label. All lights will now flash. Briefly press the front button once. This will switch on the Hotspot. When you now press the same button on the front of the Fatboy label for at least 2 seconds, you will see 1, 2, 3 or 4 lights.

1 light = 25%
2 lights = 50%
3 lights = 75%
4 lights = 100%

For the Hotspot Blanket 1.0 (without an on/off button on the back of the Fatboy label):

When all 4 red LED lights in the Fatboy label (directly above 'boy') are on continuously.

For example, if the last light is still flashing, the battery is still charging.