The battery for the JBL Charge 4 is a powerful lithium-ion battery with a voltage of 3.7 volts and a capacity of 7800 mAh. This rechargeable battery is specifically designed for use in JBL Charge 4 speakers and provides a reliable power source for longer listening sessions. Weighing 161 grams, it is lightweight and portable, making it ideal for mobile use. The device-specific size ensures a perfect fit in the device, allowing for easy installation. The battery falls under the category of device batteries and meets the requirements for labeled batteries. The UN number 3480 indicates the safety standards that must be observed when handling and transporting lithium-ion batteries. This battery is a practical solution for anyone looking to maintain the performance of their JBL Charge 4 speaker.