How should I charge my Beats Flex?
Charge Beats Flex with the included charging cable and a power adapter or computer. Only use an adapter that complies with applicable country regulations and international safety standards, including IEC 60950-1. Never use damaged cables or chargers, and avoid charging when moisture is present, as this can cause fire, electric shock, or injury.
From the official Beats Flex Wireless Earbuds manual, page 1
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