AGPtek S1B Manuel De L'utilisateur page 5

 About the Rechargeable Battery & Charging
1. Regarding the lithium rechargeable battery:
(1) This Bluetooth Speaker has an internal, non-user replaceable battery. For best results,
the first time you use this Bluetooth Speaker, let it charge for about 2~3 hours or until
the battery icon shows the battery is fully charged.
In Charging
Note: The power bar may be displayed incorrectly. This is normal. In order to
get a full charge, please charge for at least 3hrs until it shows in full
charge level.
(2) For maintain the battery life and performance, if speaker isn't used for a while, the
battery might need to be recharged. Charge the battery at least once every month.
2. To recharge the built-in battery:
(1) Connect the Micro USB socket with the PC's USB port Power or DC 5V, 500mA
through USB cable.
(2) Disconnect the USB cable when it is done.
Empty/Low battery
Full battery
Note: Please tighten the Rubber Seal Cover
after charging to prevent water from
penetrating into the speaker.
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