1. Quick Specifications

Item	Specification
Product Name	JBL Charge 3 Replacement Battery
Brand	ESC
Compatible Device	JBL Charge 3 Portable Bluetooth Speaker
Product Type	Compatible Replacement Battery
Battery Chemistry	Lithium-Ion Polymer
Rated Voltage	3.7V
Rated Capacity	6000mAh
Rated Energy	22.2Wh
Protection Circuit	Included
Main Protection Functions	Overcharge, over-discharge, overcurrent and short-circuit protection
Connector	Confirm against the original battery
Warranty	12 Months
Sample Availability	Available
OEM Service	Customized battery labels, barcodes and packaging
Target Buyers	Repair centers, refurbishers, wholesalers and distributors

2. What Is a JBL Charge 3 Replacement Battery?

A JBL Charge 3 replacement battery is a rechargeable lithium-ion polymer battery pack designed to replace an aged or failed internal battery in a compatible JBL Charge 3 portable Bluetooth speaker.

The JBL Charge 3 was originally designed with a 3.7V 6000mAh lithium-ion polymer battery system. After years of charging, discharging and storage, the original battery may gradually lose usable capacity and develop higher internal resistance.

Common battery-related symptoms may include:

· Noticeably shorter playback time

· Rapid battery drain

· Poor charge retention

· Unexpected shutdown

· Reduced operating time at higher volume

· The speaker working while connected to power but shutting down quickly on battery power

A correctly matched replacement battery can restore usable portable operation when the problem is caused by battery degradation.

However, battery replacement cannot repair faults involving the charging port, charging IC, USB output circuit, mainboard or other internal electronic components.

For accurate replacement, buyers should verify the exact speaker model, original battery label, voltage, connector, wire sequence, polarity and battery dimensions before ordering.

3. Key Features

a. 6000mAh Original-System Capacity

The battery is designed around the 6000mAh capacity specification used by the JBL Charge 3 battery system. Capacity inspection helps verify that the supplied battery meets the agreed rated specification rather than relying only on the printed label.

b. Stable 3.7V Electrical Platform

The replacement battery uses the applicable 3.7V lithium-ion polymer platform to support charging and discharging through the compatible speaker's original power-management system.

c. Integrated Protection Circuit

The battery pack includes a protection circuit designed to help manage overcharge, over-discharge, overcurrent and short-circuit conditions during normal charging and operation.

d. Compatibility-Focused Inspection

Voltage, connector type, wire sequence and polarity are critical in replacement-battery projects. ESC supports compatibility verification using the original battery label, connector photo and battery dimensions before sample or bulk orders.

e. OEM and Wholesale Supply

ESC supports samples, mixed-model orders, customized battery labels, barcode labels, retail packaging and bulk production for professional repair, refurbishment and replacement-parts businesses.

4. Technical Specifications

Technical Item	Product Data
Brand	ESC
Product Type	Replacement Bluetooth Speaker Battery
Compatible Speaker	JBL Charge 3
Battery Chemistry	Lithium-Ion Polymer
Cell Condition	Brand-New Cells
Rated Voltage	3.7V
Rated Capacity	6000mAh
Rated Energy	22.2Wh
Maximum Charging Voltage	Confirm according to the final ESC cell and pack specification
Battery Dimensions	Confirm according to the ESC production drawing
Connector Type	Must be confirmed against the original battery
Wire Sequence	Must be verified before production
Polarity	Must be verified before installation
Protection Circuit	PCM Included
Protection Functions	Overcharge, over-discharge, overcurrent and short-circuit protection
Capacity Inspection	Completed according to applicable batch-testing requirements
Voltage Inspection	Completed according to the outgoing inspection procedure
Internal Resistance Test	Completed according to the applicable inspection procedure
Charge and Discharge Test	Completed according to the production standard
Connector Inspection	Completed before packing
Polarity Verification	Completed according to the confirmed sample
Appearance Inspection	Completed before shipment
Warranty	12 Months
Sample Availability	Available
OEM Options	Battery label, barcode, retail box and outer carton
Available Documents	CE, MSDS and UN38.3, subject to the exact product file
Shipping	Battery-compliant air, sea or approved logistics channels

5. Compatible Model

Brand	Compatible Device	Battery System	Verification Required
JBL	JBL Charge 3	3.7V 6000mAh Lithium-Ion Polymer	Confirm connector, polarity, wire sequence and dimensions

Compatibility Notice

This battery should not automatically be considered compatible with JBL Charge 1, Charge 2, Charge 2+, Charge 4, Charge 5, Charge Essential or other JBL Charge-series speakers.

Different speaker generations and production batches may use different battery dimensions, connectors, cable lengths, wire sequences or internal structures.

Even when two batteries have similar voltage and capacity specifications, physical and electrical compatibility must still be confirmed.

If the original battery model is unclear, please provide:

· A clear photo of the original battery label

· A close-up photo of the connector

· Wire sequence and polarity

· Battery dimensions

· Exact speaker model

· Required quantity

6. Applications

Bluetooth Speaker Repair Centers

Suitable for professional repair businesses replacing aged JBL Charge 3 batteries affected by short playback time, poor charge retention, rapid power loss or unexpected shutdown.

Speaker Refurbishment Companies

Designed for companies that inspect, repair, grade and resell used portable Bluetooth speakers in refurbished and secondary markets.

Replacement-Parts Wholesalers

Suitable for wholesalers supplying speaker batteries and electronic spare parts to repair stores, service centers and regional distributors.

E-Commerce Spare-Parts Sellers

Supports professional online sellers requiring clear specifications, stable model identification, barcode labels and retail-ready packaging.

Private-Label Battery Brands

ESC supports customized battery labels and packaging for companies operating their own replacement-battery brands.

Non-Warranty Repair Programs

Suitable for professional non-warranty maintenance and replacement projects after the battery fault and product compatibility have been confirmed.

7. Original JBL Charge 3 Battery vs. ESC Replacement Battery

Comparison Item	Original JBL Charge 3 Battery When New	Aged Original Battery	ESC Replacement Battery
Product Role	Factory-installed battery	Original battery after long-term use	Compatible replacement battery
Battery Chemistry	Lithium-Ion Polymer	Lithium-Ion Polymer	Lithium-Ion Polymer
Rated Voltage	3.7V	Originally 3.7V	3.7V
Rated Capacity	6000mAh	Originally 6000mAh	6000mAh rated capacity
Rated Energy	22.2Wh	Originally 22.2Wh	22.2Wh
Battery Condition	New when the speaker was manufactured	Chemically and electrically aged	New replacement battery
Usable Capacity	Full usable capacity when new	Usually reduced after long-term use	Supplied according to the stated rated specification
Internal Resistance	Lower when new	May increase with aging and cycling	Inspected according to production requirements
Playback Performance	Up to the original device reference under suitable conditions	Usually decreases as the battery ages	Designed to restore usable battery-powered operation
Performance at Higher Volume	Stable when the battery is healthy	Voltage may drop faster under higher load	Designed for stable output within specification
Charge Retention	Normal when new	May decline after years of use	New cells with inspected electrical performance
Unexpected Shutdown	Low when the battery and device are healthy	More likely when the battery is severely degraded	Reduced battery-related shutdown risk when correctly matched
Protection System	Original factory battery protection	Original protection system with unknown aging condition	New integrated protection circuit
Compatibility	Factory matched	Already installed in the device	Connector, polarity and dimensions must be confirmed
Warranty	Original JBL warranty terms	Usually expired	12-month ESC warranty
Branding	JBL original component	JBL original aged component	ESC or customized private label
Packaging Customization	Not applicable	Not applicable	Available for qualified OEM orders
Installation	Factory installed	Already installed	Professional replacement required

Important Comparison Notice

The ESC battery is a compatible replacement product and is not manufactured, endorsed or authorized by JBL.

The original JBL Charge 3 specification of up to approximately 20 hours of playback is a device-level reference under specific operating conditions. A replacement battery should not be promoted as guaranteeing 20 hours of playback.

Actual operating time can vary according to:

· Speaker volume

· Audio content

· Bluetooth usage

· USB power-bank output use

· Battery temperature

· Speaker mainboard condition

· Charging-circuit condition

· Overall device age

8. Customer FAQ

a. Is this battery compatible with the JBL Charge 3?

Yes. This replacement battery is designed for compatible JBL Charge 3 portable Bluetooth speakers using a 3.7V 6000mAh lithium-ion polymer battery system.

Before ordering, the original battery label, connector, wire sequence, polarity and physical dimensions should be verified.

b. What are the original JBL Charge 3 battery specifications?

The JBL Charge 3 battery system uses a 3.7V 6000mAh lithium-ion polymer battery configuration with approximately 22.2Wh rated energy.

c. Is this battery compatible with JBL Charge 2, Charge 4 or Charge 5?

Compatibility should not be assumed.

Different JBL Charge generations may use different battery dimensions, connectors, wire sequences and internal mechanical structures even when some electrical specifications appear similar.

d. Will replacing the battery restore the speaker's original runtime?

A correctly matched new battery can improve operating time when the original problem is caused by battery aging.

Actual runtime depends on speaker volume, audio content, Bluetooth use, USB power output, ambient temperature and the condition of the speaker electronics.

e. Does the battery include a protection circuit?

Yes. The complete replacement battery includes a protection circuit designed to help manage overcharge, over-discharge, overcurrent and short-circuit conditions during normal operation.

f. How do I confirm the correct battery before ordering?

Please provide the exact speaker model, a clear photo of the original battery label, a close-up photo of the connector, wire sequence, polarity, battery dimensions and required quantity.

This information helps ESC verify compatibility before sample or bulk production.

g. Is the 6000mAh capacity tested before shipment?

Capacity inspection is completed according to the applicable production and batch-testing requirements.

For qualified bulk orders, customers may discuss specific batch inspection and test-record requirements before production.

h. Can I order a sample before placing a bulk order?

Yes. Samples are available for compatibility, connector, charging and runtime evaluation before bulk ordering.

Sample price, freight and sample-refund terms should be confirmed with the ESC sales team.

i. Can ESC customize the battery label and packaging?

Yes. ESC supports customized battery labels, barcode labels, retail boxes, warranty cards, instruction sheets and outer cartons, subject to order quantity and artwork requirements.