It takes around 45 to 60 min. to complete fully charge. It battery backup is about 3 to 4 hour without case. It case can charge the earbud up to 2 times when it is fully charge. It blink when we plug in charger and stop blinking when it fully charged. It gives very excellent sound and easily fit in our ears. It takes around 45 to 60 min. to complete fully charge. It battery backup is about 3 to 4 hour without case. It case can charge the earbud up to 2 times when it is fully charge.