Trickle Charge o nthe cheap

[BUSABAZZ]

I bought a 3 phase trickle (smart) charger from fleabay for $50, you must have "some" charge in the battery for it to operate properly.... Phase 1, the charger determines how low the battery is and how much to begin charging.... Phase 2, charging begins and continues until the battery is full.... Phase 3, the charger swithches to stand-by mode and will mind the battery so if the charge drops, it tops up the battery to keep it full... I have left the charger connected for over a week at times and there are no adverse effects.