This Wireless Q9 Backlit Mini Keyboard with Touchpad is perfect for travel, school or the office. The keyboard has a rechargeable battery that will discharge if kept for a long period of time without usage. Use the specified charger. Disconnect the keyboard after the battery has been fully charged. Overcharging the battery will shorten the lifespan of the battery. Do not expose the keyboard in extreme heat or cold. Extreme temperatures will shorten the lifespan of the battery.