I am looking for an RS-MMC 512mb card for my nokia 770. Please suggest some good deals on the 512mb card...

Froogle is your friend:

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http://froogle.google.com/froogle_cl...r=&scoring=mrd

http://froogle.google.com/froogle_cl...r=&scoring=mrd

I would give amazon a try. EUR 34 or $35 are not very much for a 512 MB Kingston rs-mmc I think. Beware: It needs to be a DualVoltage RS-MMC card.

Not true blazer, the Dual Voltage RS-MMC cards are made to save batterylife, but both DV and non-DV RS-MMC cards can be used in the 770.

I have a sandisk 1GB card, cost £38 from mouse to house.

I do not believe it is the dual voltage one, and I can't say I have noticed any big power drain.

Buy.com has a 512mg card for $41, but a 1 gig is only $53. Pretty dang good, I paid $74 a month ago.

I picked up a Kingston 1gb mmcmobile card from Meritline a few weeks ago. The 770 doesn't transfer at mmcmobile speeds so I bought a $10 USB external flash card reader when doing large file transfers (100mb+), it's much faster than straight to the 770.

So should we expect longer times between rechargings if we use dual voltage RS-MMC instead of regular RS-MMC? Supposing that you use a fair bit of BT & WLAN connections with the device...

Interesting point about card readers - yup those are cheap and handy these days with many card types supported in single reader. I also noticed that transferring via USB to the card on the 770, I get about 250 kB/s tops, so that's a bottleneck that comes from the writing to the card? Does 770 actually support USB 2.0, I gather that should offer us much faster speeds than this?

Whatever the mmc interface on the 770 is talking, it is slower than my external reader. Therefore the bottle neck is the 770 and not the memory card. If you research carefully you can find various difference in the transfer speeds of difference company mmc cards.