Dlyfull B4 Battery Tester – Precision Power Analysis for Every Need

Universal Compatibility
Tests AA, AAA, 123A, 18650, 21700, 22650, and 32650 batteries with high accuracy. Ideal for rechargeable and primary cells, ensuring versatility for all power needs.
Advanced Performance Metrics
Measures capacity (mAh), voltage (V), and power (W) with industrial-grade precision. Features a high-resolution LCD screen for clear, real-time data display.
Robust Build Quality
Durable ABS casing with reinforced contact points for long-lasting use. Precision-engineered circuitry ensures stable readings even under heavy testing loads.
Wide Application Scenarios
Perfect for DIY enthusiasts, professional technicians, and bulk battery retailers. Essential for quality control, recycling assessment, and optimizing device performance.
Effortless Operation
Plug-and-play design with intuitive interface. No software or calibration needed—just insert the battery and get instant results.
Bulk Purchase Advantage
Direct wholesale pricing ensures unbeatable value for high-volume buyers. Stock up on this must-have tool for your inventory or workspace.
Trusted Global Supplier
Backed by our worldwide logistics network, guaranteeing fast delivery and reliable support for businesses of all sizes.