Battery for JBL Boombox 4, PartyBox 520, 720 Battery 600 (5000mAh, 21.6V) by CELLONIC  ...  more

100% compatible replacement for JBL batteries

Specifically designed to fit your speaker. See the full compatibilities list.

Guaranteed 5000mAh capacity

Unlike many competitors, our battery capacities are true, real and guaranteed. This Li Ion battery is 5000mAh and offers long runtimes with fewer charging breaks - exactly as advertised.

High-performance 21.6V JBL Battery 600 battery

Our long-life replacement Bluetooth speaker batteries deliver consistently high performance that matches or exceeds that of your speaker’s original battery - all for a high number of charging cycles.

Superior quality and safety standards

Battery specialists since 2004, all our replacement speaker batteries undergo strict, rigorous testing to fully comply with the highest EU standards and beyond - that’s why they come with a 3-year guarantee.

The sustainable choice

Replace the battery, not your wireless speaker. It’s the smarter, cheaper, eco-friendlier choice, saving you money while cutting your environmental footprint through recycling.

Choose CELLONIC and never compromise on quality. Order now!