Compatible  Model：

JBL PartyBox 520

JBL Boombox 4

Here is some information that you might care about.

1️⃣ All battery products of our factory are manufactured with Grade A battery cells and undergo strict ex-factory inspection.
2️⃣ We welcome you to visit our factory or conduct a factory audit.
3️⃣ We not only sell finished batteries and chargers, but also have the capability to provide customization according to your requirements, along with one-stop service covering the entire process from design and prototyping to final mass production.
4️⃣ We launch new products monthly based on market demand. If you are a seller on platforms such as Amazon, these new products may become a new growth driver for your business.
5️⃣ The minimum order quantity (MOQ) for all products is 10 units.
6️⃣ Customization of product labels, logos and packaging is available.
7️⃣ We also run stores on Alibaba International and 1688.