Buy CELLONIC replacement batteries for JBL Xtreme speakers

If your JBL Xtreme (First Generation) Bluetooth speaker no longer holds its charge or shuts down mid-song, it’s probably time to replace its battery. A premium CELLONIC replacement battery restores your speaker’s original runtime, power and performance – giving you hours of uninterrupted music again.

A weak or dying battery doesn’t have to mean the end of your favourite speaker. Replacing the battery in your JBL Flip 5 is an affordable, easy way to restore its full power, portability and playtime – all at a fraction of the cost of buying a whole new speaker.

CELLONIC replacement batteries are built for long-term reliability, delivering steady performance over many hundreds of charge cycles. Each one is precision-engineered, ensuring a perfect fit and safe, efficient charging.

Replacing your JBL Flip 5 battery isn’t just better for your wallet – it’s better for the planet. You’ll keep your speaker out of landfill, reduce electronic waste and enjoy years more music from your existing device.

✅ High-capacity 5000 mAh cells for extended listening time

✅ 100% compatibility with JBL Xtreme 1 Bluetooth speakers

✅ More affordable than original JBL batteries, yet equally reliable

✅ Simple DIY installation – replace the battery at home in minutes

✅ Eco-friendly upgrade that extends your speaker’s lifespan

✅ CE-certified safety with protection against short circuits, overcharging and overheating

✅ Fast UK delivery, 30-day returns and a 3-year guarantee

Bring your JBL Xtreme back to life with a CELLONIC battery – more power, longer playtime and dependable long-term performance.

Technical details

Capacity: 5000 mAh

Voltage: 7.4 V Li-ion

Cycle life: Several hundred charge cycles under normal use

Cell technology: High-density lithium-ion with integrated safety circuit

subtel offers two CELLONIC replacement batteries for the JBL Xtreme 1. Both are compatible with the speaker, but they differ in connector design and cable polarity. Always compare your original battery’s plug and wire orientation with our product photos before ordering.

Version 1 – Standard JBL Xtreme 1 battery

Compatible with:
– JBL Xtreme 1

Replaces the following original battery model:
– JBL GSP0931134

Version 2 – JBL Xtreme 1 variant battery

Compatible with:

– JBL Xtreme 1

Replaces the following original battery model:

– JBL GSP0931134 02

Before starting, switch off your speaker and unplug all cables. The Xtreme has many screws and strong internal magnets, so work slowly and keep metal tools under control.

Important: Opening the speaker may reduce its waterproof rating. Ensure all seals are fully reseated afterward.

Step 1 – Remove the outer housing

1. Locate the seam on the underside of the speaker.
2. Insert a pry tool and gently lift the rear section of the cover.
3. Remove the two screws that become visible.
4. Pull the housing apart on both sides and lift it off.

Step 2 – Remove the side cap and passive radiator

1. On the left-hand side (zipper side), remove the 6 screws securing the passive radiator.
2. Five are accessible from the outside, one from the inside.
3. Lift the radiator off and keep the narrow rubber seal safe.
4. Disconnect the exposed battery cable from the circuit board.

Step 3 – Open the battery compartment

1. Under the zipper flap, remove the 3 screws to release the outer battery cover.
2. Lift off the cover.
3. Under it, remove 8 more screws securing the inner cover.
4. Carefully detach the small white ribbon cable that links the cover to the device.

Step 4 – Remove the old battery

1. Lift the battery out by hand.
2. Guide the cable gently past other wiring and through the housing opening.

Step 5 – Install the new CELLONIC battery

1. Insert the new battery into the compartment.
2. Reconnect the white plug to the socket.
3. Ensure the cable is routed safely and clear of moving parts.

Step 6 – Reassemble and test

1. Refit all covers, screws and the passive radiator.
2. Reattach the outer housing.
3. Fully charge the speaker and confirm normal operation.

To replace your JBL Xtreme Generation 1 battery at home, you’ll need:

• Plastic pry tool or opening pick
• Philips PZ0 & PZ1 screwdrivers
• Tweezers or needle-nose pliers
• Small container for screws
• CELLONIC replacement battery

Recommended: magnetised screwdrivers, anti-static mat

At subtel, we offer precision tool kits for repairing speakers, smartphones, tablets, laptops and more.