SIP 12/24V STARTMASTER PW6500 Heavy-Duty Professional BatteryStarter/Charger, 400A/55A 230V (05546) The SIP STARTMASTER PW6500 Digital Battery Starter Charger offers powerful intelligent charging through easy battery selection, 4 versatile charging levels, and automatic battery maintainer, meaning it can easily and safely boost Lead Acid, SLA, AGM, GEL, WET, and VRLA batteries with minimal input required from the operator. 12v/24v charging voltage and 400A max. boost rate 540Ah max. battery capacity and 55A charging current 4 different charge rate settings for added versatility Easy battery type selection for Lead Acid, SLA, AGM, GEL, WET, and VRLA Integrated charging timer and automatic battery maintainer on all types Safe Start function helps protect vehicle electronics Reverse polarity, short circuit and overload protections Auto Boost Start offers one-man operation Wheel-mounted steel casing for increased mobility Remote lead for easy one-man operation Heavy-duty leads and crocodile clips Ideal for garages and workshops