Battery Compatible with JBL Partybox 320 & Xtreme 4 - Backup Power

In this review the focus is on a single replacement battery designed to extend playtime for JBL Partybox Stage 320 and JBL Xtreme 4 speakers. The bottom line: this battery delivers a convenient, swappable backup with a clear battery-status LED and an included screwdriver, making it a practical choice for anyone who needs uninterrupted music outdoors or at events. The reviewer found it especially useful for multi-hour gatherings where carrying a single speaker without mains access would otherwise cut a session short.

Key Features

• Compatible Model Support: Designed specifically for JBL Partybox Stage 320 and JBL Xtreme 4, it ensures a direct fit for those two models without extra adapters.
• Capacity and Output: With a 10000mAh capacity and 7.4V 74Wh output, it provides a meaningful extension of runtime over a single internal battery.
• Type-C Charging: The Type-C input accepts 5V 3A / 15W charging, which makes recharging convenient using common Type-C chargers.
• LED Status Indicator: A smart LED shows charging state-red while charging and green when full-so users can monitor readiness at a glance.
• Easy Replacement: The package includes a metal screwdriver to remove and install the battery quickly, avoiding extra tools during an event.
• Manufacturer Support: A one year manufacturer after-sale promise offers straightforward recourse if there are issues during normal use.

Who It's For

This battery is aimed at outdoor entertainers, DJs, and anyone who uses a JBL Partybox Stage 320 or Xtreme 4 and needs extended run time for parties, camping or backyard gatherings. The included screwdriver and LED make it practical for people who manage gear on the move and need quick field changes.

It is not suitable for users who own other Partybox series or different speaker brands, since compatibility is limited to the two models named. Buyers who require higher capacity or integrated charging docks should look elsewhere.

Pros & Cons

Pros

• Direct compatibility with Partybox Stage 320 and Xtreme 4 keeps installation simple.
• 10000mAh / 74Wh capacity gives hours of additional playtime for most casual to moderate use.
• Type-C 5V 3A input makes recharging easy with common chargers and accessories.
• Included screwdriver and LED battery indicator improve usability in the field.

Cons

• Not compatible with other Partybox models or other speaker brands, limiting flexibility.
• Charging speed is limited to 15W via Type-C input, so full recharge can take some time.

Specifications

Brand	RORALMA
Compatible Models	JBL Partybox Stage 320, JBL Xtreme 4
Capacity	10000mAh (74Wh)
Output Voltage	7.4V
Type-C Input	5V 3A / 15W
Included Accessories	Type-C cord and metal screwdriver
Warranty	1 year manufacturer after-sale

Our Verdict

The RORALMA replacement battery is a sensible, value-minded accessory for owners of the JBL Partybox Stage 320 or Xtreme 4 who need extra uninterrupted playtime. Its straightforward fit, useful LED indicator and included screwdriver make it practical for events and outdoor use, though buyers should be aware of the limited model compatibility and moderate charging speed.

Frequently Asked Questions

Will this battery fit other Partybox models?
It is only compatible with JBL Partybox Stage 320 and JBL Xtreme 4 and is not compatible with other Partybox series.

How do I know when the battery is charged?
The smart LED shows red while charging and green when fully charged.

What comes in the box?
The battery ships with a Type-C cord and a metal screwdriver for battery replacement, plus one year manufacturer after-sale support.