150-Piece Kit of 10 Sizes of Nickel-Plated AA Battery Springs, Negative-to-Positive Conversion Spring Contact for AA Batteries, Spring Contact Plate for Battery Replacement

⚡ What You Get ------ In this kit, you will receive 150 pairs of nickel-plated AA battery springs in 10 sizes, including 50 bipolar plates and 50 pairs of unipolar plates (with 50 separate positive and 50 negative poles). All are neatly packaged in a clear plastic box for easy storage and transport. An excellent replacement for battery spring contact plates. ⚡ Premium Material ------ These battery springs are made of high-quality iron, do not easily deform or break, and offer excellent electrical conductivity. Meanwhile, the surface is treated with nickel plating, which greatly improves resistance to oxidation and corrosion, also improves wear resistance, extends its lifespan and gives it better electrical performance ⚡ 10 Sizes Available ------ We have prepared for you 10 sizes of negative-to-positive conversion spring contacts for AA batteries: 5 sizes of single-pole plates (length * width): 12x10 mm, 12x11.2 mm, 12x12 mm, 13x12 mm, 14x12 mm; 5 sizes of bipolar plates (length * width): 26.5x12 mm, 28x12 mm, 27x12 mm, 25x12 mm (with pins), 28x12 mm (with pins) ⚡ Easy Installation ------ The battery spring contact plate is designed with standardized mounting holes and positioning structures, allowing for direct screw mounting or installation in the device's battery compartment via clips. The installation process is simple and requires no complex tools, saving time and effort. Even beginners can quickly complete the installation. ⚡ Combination of Unipolar and Bipolar Plates ------ The set includes both unipolar and bipolar plates, suitable for circuits powered independently by a single battery or used with battery packs. It easily meets the battery installation requirements of various electronic devices, whether children's toys, remote controls, small flashlights, or various DIY electronic projects; it offers perfect compatibility.