Here is a quick answer and a few things I found out so far. Sorry I have to post this as an answer but I do not know how to attach images to comments. this is from [http://www.technologyreview.com/read_article.aspx?id=20583&ch=infotech&pw7=T&a=f|here] Camera. Seventy times a second, the pen photographs specially printed paper within a radius of seven millimeters, using a camera and an infrared diode behind the point to read a pattern of dots. The pen uses the photographic information to map its location against the complete pattern.
B. Processor
A Samsung Arm 9 processor runs the pen's software, including the algorithms that track its position.
Here are the battery particulars I got so far Type : Rechargeable Lithium Ion Model No.:GP1229L30
Cylindrical Cell
Nominal Dimension
(with Sleeve)
: F = 11.5 mm *
H = 28.2 mm
Applications : Recommended discharge current
65 to 650 mA
Nominal Voltage : 3.7V
Capacity : Typical: 325 mAh
Minimum: 310 mAh
When discharged at 65 mA to
2.8 V at 23 oC
Charge Condition : 162.5 mA to 4.2V for 3.0 hrs at 23 oC
Recommended
Charging Condition in
Applications
: 65 mA to 260 mA (0.2 to 0.8C)
Charge termination control
recommend control parameters:
Taper current 0.05C at 4.2 V
Clamped Charging
Voltage
: 4.2 V +/- 0.05 V
Service Life : >500 cycles (70% of typical
capacity)
Weight : Approx. 8.5 g
Internal Resistance : 150 mW max. at 1000Hz
Ambient Temperature
Range
: Charging : 0 to 45 oC
Discharging : -20 to 60 oC **
Storage (1 month) : -20 to 45 oC
Storage (6 months) : -20 to 40 oC
Storage (1 year) : -20 to 35 oC
the battery is not consumer grade so we'll have to find it as well
[image|98504|size=thumbnail]