Premium 2AA/9V Battery Holder with BMS & Spring Contacts
Dual-purpose design fits 2AA batteries or 9V block (with spacer) plus 21700/18650 cells—ideal for DIY electronics, flashlights, and custom power solutions. High-conductivity spring clips ensure secure contact and minimal voltage drop, while the 4mm spacer accommodates varied cell sizes. Integrated BMS (Battery Management System) protects against overcharge/discharge, extending lithium battery lifespan. Durable ABS construction with precision-molded clips for reliable industrial or hobbyist use. Perfect for prototyping, emergency kits, and portable device mods—bulk pricing available for large-scale projects.