my 2c worth...
My car will also go flat if not used for a week... its the security system that drains it.
But a word of warning... some of the chargers out there (mine included) make you
press a "mode" button when you first connect them. The problem is, if the power goes
out, even for 2 minutes, the stupid things stop charging until someone presses the
mode button again. So, make sure whatever you get will actually resume charging
after a power outage.
Interestingly, looking at the MXS 5.0 that other have, it appears that this charger
has exactly that problem. If the power goes out (or someone accidentally knocks the switch)
it will not resume recharging. Unfortunate that they put so much effort into
such a great charger but overlooked such an obvious problem.
