Battery Life When Not Used for Long Times

Am new to this Board, have a 2G Clip, which I just started using last week.  I only used my Clip  at the gym for about a hour at a time, Monday-Wednsday-Friday.  First question is about how long should the battery last with this long periods of none use?  Second question will it shorten the battery life if I recharge once a week, with the Clip showing only maybe 50% battery?

The battery should retain its charge for long times… “Li-ion batteries do not suffer from the memory effect. They also have a low self-discharge rate of approximately 5% per month” (Wikipedia)

Ive also read that the batteries should be charge as much as posible… (For my Archos, I have 2 battery packs… and I use the older one till it drops to 0% and the newer one I charge as much as posible) so the thing is that charging more frequently should keep your battery life-spam up…

Bottomline, to charge once a week… when it should have 50% of battery will actually keep your battery life longer instead of shorten it…

Buc, thank you for your prompt and informative reply.