Fully automatic 12V 3-stage battery charger, designed for trickle charging and maintaining a variety of EFB & AGM (stop/start), GEL, lead acid and calcium batteries with auto-shut-off maintenance function. Zero volt battery charging, enabling recovery and charging of a completely discharged battery (providing any load removed from the rechargeable battery). Old battery sulfation repair function. Reverse polarity, short circuit, over temperature, over voltage and overcharging protection. Easy-to-read LED indicators display power status and charging stages. TWO YEAR GUARANTEE FROM A REPUTABLE UK COMPANY – Founded in 1978, Sealey is a large family run business with a vast product range. Trusted by professionals, all Sealey products are thoroughly tested and backed by unrivalled aftersales service.