LD-4W vs LD-3W
October 19th, 2007
LD-4W 更加轻巧，更着重于便携性，运动性。
http://europe.nokia.com/A4494031
vs
http://europe.nokia.com/A4400071
能挂在 Keyring 和皮带上。
LD-4W 的电池是内置不可拆卸的。
手册说：
The GPS module has an internal, nonremovable, rechargeable battery. Do not attempt to remove the battery from the GPS module, as you may damage it.