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They are all "Smart Chargers" microprocessor controlled. You will find a large selection of 12 volt and 24 volt SLA chargers. We have 36V and 48V Golf Cart Battery Chargers, to RV battery chargers and waterproof Marine Chargers. A few of the top battery charger brands available at Impact Battery are Dual Pro, Samlex, NOCO, Quick Charge, Battery Tender,Pulse Tech, and Schauer.
In short: microprocessor controlled. When smart chargers first came out they typically had a three stage charge profile. With the last stage or float mode, arguably being the most important since it allowed a user to leave the battery connected to the charger indefinitely. Today’s smart chargers often have 5-9 phases and use patented algorithms (special secret charger profiles controlled by a microchip) to help extend your batteries life. The multi-purpose Genius charger, for example, can be used on 6V and 12 volt batteries and is smart enough to recognize the type of lead acid battery connected to it. You no longer need to fear overcharging (or undercharging) an AGM, gel, calcium or standard wet battery.
Did you know that trickle chargers can actually damage your batteries? This type of SLA charger was popular many years ago before smart float chargers became available. It was considered the best and safest method to keep a battery fully charged, but the obvious draw back was that it maintained constant voltage (V) and simply produced a “smaller” current flow (Ah). Today’s smart chargers solve this issue by ‘reading’ the battery and reducing voltage and current according to predetermined charge profiles and/or as determined by the fluctuations within the battery. So although the term ‘trickle charger' is still widely used, it is used somewhat out of context to mean a small maintainer or float charger.