Professional 12V/24V Battery Diagnostics ➤ DUOYI DY221 Load battery tester Tests cranking/charging systems & CCA value (100-2000) for lead-acid batteries with Kelvin 4-wire tech.– Catch issues before $500 garage bills.
Advanced Safety & Accuracy ➤ Polar reversal/over-voltage protection + loose lead detection ensures precise readings per IEC/EN61010-1 standards.– like $2,000 pro tools.
User-Friendly Operation ➤ Large backlit LCD + touch-tone keys simplifies testing. Stores last results for Battery/Cranking/Charging tests.– faster than brewing coffee.
Comprehensive Vehicle Analysis ➤ Tests cranking voltage (>9.6V good), charging status (13.4-14.6V normal), and ripple voltage (<1200mV).
Essential for Auto Shops ➤ Must-have for battery sales/repair shops, mechanics, and DIYers with GB/SAE/JIS/DIN standards support.
Test ANY Battery In-Car ➤ AGM/GEL/EFB? 100-2000 CCA? Motorcycles, Passenger Cars, Vans, Off-Road Vehicles, Heavy-Duty Trucks, Buses, Cranes, Tractors, Excavators, Farm Equipment, Yachts & Boats, Street Sweepers, Loaders & More,Test under hood – no wrench needed.
Overview
Brand : DUOYI
Power Source : Corded Electric
Item dimensions L x W x H : 6.7 x 1.4 x 3.6 inches
Orders are usually processed within 1–2 business days. Standard shipping takes 3–7 business days within the U.S. Delivery times may vary depending on your location and chosen shipping option. You’ll receive a tracking number once your order has shipped.
If you're not completely satisfied with your purchase, you can return it within 14 for a full refund. Please ensure the item is unused and in its original packaging.
We accept all major credit and debit cards (Visa, MasterCard, American Express), PayPal, and Shop Pay. For some regions, additional local payment methods may also be available at checkout.
f you need to make changes or cancel your order, please contact us as soon as possible at [your support email]. We can modify or cancel the order before it has been processed or shipped. Once your order is shipped, we’re unable to make changes, but you can still request a return or exchange after delivery.
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