Let me start with a disclaimer; BatteryStuff.com does not sell inexpensive off the shelf chargers such as the type often found at retail outlets and certain other online stores. We cater specifically to microprocessor controlled chargers, also known as Smart Chargers. All the chargers we stock are reviewed, tested, and selected based on function, reliability and durability. These chargers are designed to charge lead acid and other types of batteries based on computer generated algorithms. Simply put, the charger collects information from the battery and adjusts the charge current and voltage based on this information. This allows the battery to be charged quickly, correctly, and completely when using a smart charger. read more...