What's the best device to dump GBA carts?

What is everyone using to successfully transfer or save files from GBA games. Save batteries are bound to run dry on everyone. Would like to be able to save the files during the battery replacement. Heard of replacing the battery by doing a second battery during swap. Would rather not risk it.

 

I own the 1G version of this product:



You don't need the flashcart, just the reader. Though I doubt anyone would sell the reader standalone.

 

I personally use a DS lite and a DS flashcart to dump my saves and games. The program is use I GBA EXPloader.

 

How much do the EZ-Cart with readers usually go for?

 

This one is 30 bucks. http://www.tototek.com/store/index.php?main_page=product_info&cPath=1_33&products_id=105

 

Thanks, dude!!!
P