ANCEL BT521 12V Smart Car Battery Charger & Maintainer - Trickle Charger, Float Charger with Desulfator - Universal Battery Tester for Cars, Motorcycles, Trucks, Boats, RVs - Perfect for Winter Storage & Long-Term Vehicle Maintenance
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Description
BT521 stands out as one of the few products on the market that combines charging, testing, repair, and maintenance in a single device, making battery care easy and efficient. Protect your investment, extend battery life, and ensure long-term performance with this all-in-one solution Previous page Next page A BT521 = 4 separate tools. It features smart charging, overload, overheating, and short-circuit protection, and supports multiple battery types. With an LCD screen for real-time updates, making it a superior choice compared to similar products Previous page Next page Compatible with all 12V batteries, including lead-acid, AGM, GEL, EFB, and Flooded types, making it ideal for cars, trucks, motorcycles, and more. It ensures safe, efficient operation, extends battery life, improves performance, and provides reliable, all-in-one battery management for diverse needs Previous page Next page Is the charger compatible with other types of 12V devices? Designed for car batteries, it also charges other compatible 12V devices like motorcycles, boats, and RVs. How should batteries be maintained if not used for a long time? If the battery will be stored for an extended period, it's best to fully charge it and recharge it every few months. ANCEL BT521 can help maintain your battery's charge. How to choose the right battery type? 1.Check the battery label for specifications to choose the right type 2.Consult your car dealership or battery manufacturer for guidance. Does it support quick charging? Yes, the quick charging mode is available to save charging time while meeting your charging needs without damaging the battery. Does the 8-step mode require manual selection? No, the 8-step mode is automatic and adjusts based on battery condition. Compare ANCEL Battery Monitoring/Testing Devices BT521 Battery Charger Add to Cart BM300 Battery Monitor Add to Cart BM300 PRO Battery Monitor Add to Cart BA101 Battery Tester Add to Cart BST600 Battery Tester Add to Cart Customer Reviews 4.7 out of 5 stars 44 4.5 out of 5 stars 779 4.2 out of 5 stars 167 4.4 out of 5 stars 2,912 4.3 out of 5 stars 134 Price $79.99$79.99 $39.99$39.99 $47.15$47.15 $39.99$39.99 $149.99$149.99 Testing Voltage 12V 12V 6V/12V/24V 12V 6V/12V/24V Cranking Test ✔ ✔ ✔ ✔ ✔ Charging Test ✔ ✔ ✔ ✔ ✔ Battery Test ✔ ✔ ✔ ✔ ✔ Measure Standard CCA/BCI/CA/MCA/JIS/DIN/More — — CCA/BCI/CA/MCA/JIS/DIN/More CCA/BCI/CA/MCA/JIS/DIN/More Battery Types FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More Print Data ✘ ✘ ✔ ✔ ✔ Advanced Functions Charger,Repair, Maintainer Bluetooth,Real-time Monitoring Bluetooth,Real-time Monitoring Quick Test,Ripple Test TEMP,Quick and Ripple Test Language English/French/German/Spanish English English/French/German/Spanish English/French/German/Spanish 10+ languages
Features
FULLY AUTOMATIC CHARGING Advanced 8-step charging, including diagnosis, repair, constant current, constant voltage and float charging, this system efficiently restores depleted or sulfated batteries. It delivers a stable 4.3A-5A current with low ripple and heat, minimizing battery wear and extending lifespan
MAINTENANCE MODE Keep your battery in peak condition with intelligent trickle charge, preventing overcharging, self-discharge and sulfation. Extend battery life to 5–10 years instead of 3–4, saving $300+ by avoiding 2–3 costly replacements. Unlike chargers without a Maintenance Mode, this ensures optimal charge without damage (Pro Tips Using this mode once a year keeps your battery healthy)
BATTERY TEST：More than a battery charger, it features advanced battery diagnostics with 99.6% accuracy. In seconds, it checks voltage, cranking power, and charging efficiency, providing instant, precise insights. Detect potential issues early and avoid expensive towing and repair costs
UNATTENDED MODE Worried about battery degradation during long business trips?Let BT521 Guard Your Battery! After completing the 8-stage charging, it automatically switches to this mode, cutting power consumption by 50% while maintaining uninterrupted operation—extending battery lifespan by up to 30%
ADVANCED SAFETY PROTECTION：Built-in thermal sensor that adjusts charging current based on ambient temperature, preventing overcharging in heat and undercharging in cold. It also ensures safety with protections against overcharging, overheating, short circuits, overvoltage, over-discharge, and reverse polarity
UNIVERSAL COMPATIBILITYDesigned for 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free
