For 4pcs 3A Battery Pack Box with Switching with Cord and Lid Key benefits Safe, accessible power: childsafe battery compartments and a transparent lid let you check and change batteries quickly without exposing contacts. Ready to use: builtin on/off switch and attached wire provide immediate, plugandplay control of power to your device — no soldering required. Faster project setup and reliable control: the integrated switch saves battery life and simplifies wiring for prototypes and finished projects. What it does and why it helps Holds 4 x 3A batteries to provide portable DC power for small devices and prototypes. Transparent lid gives a clear view of battery status, reducing troubleshooting time. Childsafe compartment design protects terminals and reduces accidental access, making it suitable for educational toys and classroom use. Prewired with a switch and cord so you can connect devices quickly without additional assembly or soldering. Key attributes Function: battery holder with builtin on/off switch and attached cord for external connection. Compatibility: designed for devices that accept power from 4 x 3A batteries; ideal for DIY electronics, educational toys, and small batterypowered gadgets. Accessibility: transparent lid for quick battery inspection and easy replacement. Safety: childsafe compartment layout to limit direct access to battery terminals. Installation: plugandplay wiring — no soldering required. Typical use scenarios Electronics prototyping: use as an immediate power source for breadboard projects, sensors, and microcontroller experiments where you need a controllable, portable supply. Educational toys and kits: integrate into classroom or home learning kits where teachers or parents need safe, simple battery compartments with an easy switch. Portable devices and repairs: temporarily power small gadgets or an internal battery box for portable devices needing 4 x 3A batteries. What's included / quick summary Battery pack for 4pcs 3A batteries Builtin on/off switch Attached cord/wire for external connection Transparent lid for easy access and inspection Childsafe compartment design No soldering required For 4pcs 3A Battery Pack box with Switching with Cord and Lid