When the battery capacity of the Intuos Creative Stylus 2 reaches about 15%, the LED on the stylus starts to blink red.
In this case, you need to recharge.
1. Remove the cap at the top end of the stylus
2. Insert the USB cable shipped in the stylus case and connect it to a computer or USB charger. It takes approximately one hour to recharge the pen to 80% capacity. To reach 100% capacity, you need about two hours of recharging.