Sony SVD1322BPXR - Manual (Page 227)

2. Insert the battery into the pen with the + side toward the nib.
3. Reattach the Tail cap.
Note
Do not remove the Tail cap except for when replacing the battery.
If you do not intend to use the pen for a while, remove the battery.
The pen should not be used with a commercially available rechargeable battery. Using a
rechargeable battery may result in battery leakage and malfunction.
When the battery power becomes low, replace with a new battery promptly. Keeping a
depleted battery in the pen may cause battery leakage.
Do not attempt to recharge a battery.
Refer to the supplied safety manual.
Using the Pen Hook (Digitizer Stylus supplied models)
By using the pen hook, you can carry your VAIO computer with the supplied pen (Digitizer
Stylus) attached to the computer.
1. Attach the pen hook to the hole on the bottom of your VAIO computer.
2. Insert the pen clip into the pen hook.