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This Lenovo IdeaCentre A540 27 All-In-One system ships with a Lenovo Premium Wireless Keyboard, with rechargeable internal battery. There is an included USB-c (keyboard side) to USB cable that needs to be connected to the front of the keyboard (USB-c side of the cable) then plugged into a USB port on the computer, to charge the keyboard. You can use the keyboard while it is charging. Let the keyboard charge for 15-minutes before use. If the issue continues, we recommend you contact Lenovo Tech Support for additional help at: 877-453-6686.
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