[SaberOne]

While I have one of those approved Jump n' Go jump starters; but more times than not, I forget to put it back in the trunk after wall-charging. With the summer heat being around 110º in the garage, the thing' discharges after about 3-weeks.

For my own cars; I use the 'BatteryMINDer 128CEC1' Battery Charger/Tender; and even then, I get lazy.