Generally, it takes 2-3 hours to charge a Bluetooth headset, and a fully charged Bluetooth will have a blue indicator on.
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1. Newly bought Bluetooth headphones can be fully charged for the first time, and do not need to be charged for too long.
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2, Bluetooth headset internal 3.7V 150-500mah lithium-ion battery, lithium-ion batteries do not have a memory effect like nickel-cadmium batteries, so no matter what time to charge, will not affect the use of the battery is too large.