A traditional battery charger simply keeps charging the battery at the output voltage of the charger (around 14.5v for a 12v battery), and so if you leave it permanently connected it will over-charge the battery, and eventually evaporate the electrolyte, or cause other fatal damage in a gel battery. Don't forget that a 12 volt battery is actually 13.2v (2.2v per cell).
Whereas a battery conditioner reduces it's output voltage to match with the battery's voltage as it rises to the correct level, and can therefore be left permanently connected. Conditioners are sometimes referred to as "intelligent" or "smart" or "trickle" chargers.
Technical Information.
These top quality solar battery chargers can be left outdoor permanently or can operate through windows, allowing them to be used as either permanent or temporary installations.
2 watt 150 milliamp model
Provides immediate battery charging when exposed to daylight, even on cloudy days
Touch-action indicator lets you know your panel is charging
Quick and easy connections
Cigarette lighter adaptor and battery clamps, terminal rings and connector wires included
Connect multiple panels in seconds without tools or rewiring
Mounting points for screw fitting or suction cups included
Dimensions: 394mm x 127mm x 20mm = 15 1/2” x 5” x 7/8”
