You connected your pump to a power source that does not have enough power to charge the pump.

1. Tap OK and connect the pump to a different power source to charge.

2. Try charging the pump in a wall outlet using the Tandem-provided wall adapter and cable. You may need to leave the pump plugged in for up to 30 minutes for the alert to clear and the pump to begin charging.

3. If the alert recurs, try charging the pump for an additional 30 minutes using a different wall adapter.

4. If using a computer to charge the pump, make sure you have the t:connect uploader installed on the computer. You can also try using a different USB port. If using a laptop, make sure the laptop is connected to a power source.