The Dlyfull Battery Tester is a versatile universal battery checker designed for testing various types of batteries such as AA, AAA, C, and D. With its  LCD display, users can easily monitor the battery levels and ensure they are always informed about the health of their batteries. This model, B2, is backed by a 100% satisfaction guarantee, providing customers with peace of mind and reliability in their battery testing needs. Made in China, this electronic device is a practical tool for maintaining and managing batteries efficiently. Fast, safe shipping.