The Streetwize Accessories 4Amp 6/12V Smart Battery Charger is a vital part of your car maintenance equipment. There's nothing worse than coming back to your car to find the battery is dead because the radio or a light has been left on. Now you can sort out the issue with no fuss. This intelligent 6V/12V battery charger comes with a built-in microprocessor that automatically controls the amount of charge to prolong the life of your battery and to prevent it from overcharging. This Streetwize battery charger follows a 3-step process: 1. Bulk stage: If the battery is severely flat, the charger will deliver its maximum charge power until the battery level is 80% charged. 2. Absorption stage: Once the battery is at 80%, the charger will reduce the charging power to give a steady charge that is absorbed by your battery. 3. Float stage: At 95% charge, the charger will further reduce its charge power to slowly bring the charge to 100%. Depth: 16 MM Suitable for charging batteries in cars and motorcycles Includes trickle charge option for slow overnight charge Also has a winter charge option for charging large batteries in freezing temperatures. Suitable for sealed lead acid (SLA), liquid electrolyte, GEL and AGM batteries Supplied with battery charging cables LCD information display Charge power: Between 3 to 120 A. Height: 5 MM Width: 6 MM