This fully automatic battery charger can be permanently left connected without risk of overcharging and damage being caused to the battery. The smart Pro 25 charger has a pulse charge facility designed to break down the build up of lead sulphate which can occur in discharged batteries or a battery left unused for a period of time to help prolong the operating life of the battery. The charger also has a controlled build up in charging rate to prevent damage or overloading the battery but also comes with a fast charge override facility to allow fast charging if required. Suitable for vehicles up to12 litres. Perfect for batteries up to 250AH. LED display. For use with 12v Batteries. Fully automatic 7 stage charging. Requires 220-240 V AC. Battery clamp leads 1.85m long. Reverse polarity indicator. Charge rate 4-25ah. Tough metal construction for use in garages and workshops. Weight: 4.1 Kg.