question about battery maintainer

Is there anyone use the battery maintainer? The battery in my convertible will drain within one month. I saw these maintainers but not sure which one I should buy. Any suggestion?

Thanks ahead.

所有跟帖： 

• Why leave your car idle for 1 month? -Kaolin007- ♂ (51 bytes) () 02/11/2009 postreply 09:36:15

• I posted one about battery maintainer, check it out -internuts- ♂ (64 bytes) () 02/12/2009 postreply 13:47:02