FOXWELL BT780 24V 12V Car Battery Tester with Printer, Professional Battery Load Analyzer, 100-2000CCA 汽车用品 Cranking Charging System Checker for Motocycle Heavy Duty Truck Marine SUV & Auto Shop

CONSISTENT ACCURACY IN COLD WEATHER - While many basic testers fail in freezing winters or scorching summers, leaving you with unreliable readings, this professional car battery tester can work from -20 °C to 60 °C ensuring 99.9% accuracy. Whether you’re checking a car in a snowstorm or diagnosing an RV under the blazing sun, you’ll always get precise results—saving you stress, money, and time on the road.BUILT-IN BATTERY POWER FOR UNMATCHED CONVENIENCE - Unlike most battery load testers that depend on vehicle power, the BT780’s built-in battery lets you test deeply discharged, stored, or off-grid batteries independently. Perfect for mobile mechanics, fleet service trucks, RV techs, and roadside assistance professionals who need true go-anywhere reliability.DESIGNED FOR PROFESSIONAL USE - Built for 汽车用品 shops, fleet maintenance, and mobile technicians, the battery and alternator tester features a durable design with a 3.2″ LCD display, 6.5-ft long leads, rugged clamps, and a protective case. With TF card firmware updates, it ensures reliable, future-ready performance in workshops or field use.PREVENT DEAD BATTERIES & COSTLY BREAKDOWNS - Avoid unexpected failures with comprehensive diagnostics covering battery condition, starter performance, and alternator output. This battery tester with printer provides technician-trusted measurements for voltage, internal resistance, SOC, SOH, and charging efficiency—allowing you Avoid costly tows and roadside breakdowns. Perfect for shops and fleets that demand accuracy and accountability.WIDE COVERAGE FOR PROS AND VEHICLES - Supports 100–2000 CCA Flooded, AGM Flat/Spiral, Gel, EFB, and Start-Stop AGM batteries. Built for auto technicians, fleet managers, and battery retailers testing cars, SUVs, trucks, motorcycles, ATVs, RVs, vans, boats, buses, tractors, forklifts, generators, and heavy-duty commercial equipment. One tool covers nearly every battery you encounter.