Sugestions on how to make a water resistant device with external world connection

I am developing a project that is very similar to an actiwatch (wrist
actimeter). There are several requirements, but the most hard of them is to
be watterproof but still have an easy access external world connection.
Also would be nice to have some way to send power in to charge a LIR2032
battery (lithium-ion). The size must be something very close to a sport
watch. Looking for the off the shelf products i noticed that many
actimeters use some sort of wireless commnication but still with a very
compact size. A good example would be
http://www.camntech.com/products/actiwatch-mini/actiwatch-mini-reader

Any idea on how is the communication of that device?

Another product that is very similar to what i need (but still without all
the sensors i will use) is the philips actiwatch
(http://www.healthcare.philips.com/main/homehealth/sleep/actiwatch/default.wpd).
It got a dock to make a connection AND recharge the battery.. any idea on
how to recharge a battery wirelessy and keep a very compact size and
reasonable cost?

Any sugestions are apreciated.

Regards,

Luis Filipe Rossi



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