Xain-USA 3.7V 7000mAh Replacement Battery for Altec Lansing iMW577 & iMW577-AB Bluetooth Speakers, PN INR18650-2S, Samsung 35E Cells, 3A BMS Protection, 10K NTC Thermistor

Product Description

Restore reliable power and extended playback time to your compatible Altec Lansing Bluetooth speaker with the Xain-USA 3.7V 7000mAh rechargeable lithium-ion replacement battery pack.

Designed for Altec Lansing iMW577 and iMW577-AB Bluetooth speakers, this high-capacity replacement battery features two Samsung 35E 3500mAh lithium-ion cells arranged in a 1S2P configuration, delivering a combined capacity of 7000mAh (25.9Wh).

The battery pack includes a built-in Battery Management System (BMS) rated for 3A continuous discharge, providing essential electrical protection, along with a 10K ohm NTC thermistor for temperature monitoring.

Equipped with a Mini-SPOX 3-pin connector, this battery is intended to replace compatible original battery packs identified by part number INR18650-2S.

Compatible Models

• Altec Lansing iMW577 Bluetooth Speaker
• Altec Lansing iMW577-AB Bluetooth Speaker

Replacement Battery Part Number:

• INR18650-2S

Key Features

• Premium Samsung 35E Cells: Built with two high-quality 3500mAh rechargeable lithium-ion cells for dependable performance.
• High-Capacity 7000mAh Battery: Provides 25.9Wh of stored energy for extended speaker operation.
• 3.7V Nominal Voltage: Designed for compatible Bluetooth speakers operating with a 3.7V lithium-ion battery system.
• Built-In BMS Protection: Integrated 1S Battery Management System with a 3A continuous discharge rating.
• 10K NTC Temperature Monitoring: Built-in 10K ohm NTC thermistor allows compatible devices to monitor battery temperature.
• Mini-SPOX 3-Pin Connector: Designed for connection to compatible Altec Lansing speaker battery interfaces.
• Compact Battery Design: Measuring approximately 66.2 × 37.1 × 19.1 mm for installation in compatible battery compartments.
• Rechargeable Lithium-Ion Technology: Designed for repeated charging and dependable portable audio performance.

Technical Specifications

Specification                                      Details

Brand                                                 Xain-USA

Model Number                                    XA-0377000-ALi

Replacement Part Number                    INR18650-2S

Battery Chemistry                               Rechargeable Lithium-Ion

Battery Cell Manufacturer                    Samsung

Battery Cell Model                              Samsung INR18650-35E

Cell Configuration                               1S2P (2 Cells in Parallel)

Nominal Voltage                                 3.7V DC

Maximum Charging Voltage                4.2V DC

Rated Capacity                                    7000mAh (7.0Ah)

Total Energy                                       25.9Wh

BMS                                                  Integrated 1S Protection Circuit

Continuous Discharge Rating               3A

Temperature Sensor                             Built-In 10K Ohm NTC Thermistor

Connector                                           Mini-SPOX 3-Pin

Dimensions                                         66.2 × 37.1 × 19.1 mm

Weight Approximately:                        3.3 oz (94 grams).

Important Compatibility Notice

Please verify compatibility before ordering.

This battery is designed for compatible Altec Lansing iMW577 and iMW577-AB Bluetooth speakers using a 3.7V lithium-ion battery pack.

Before purchasing, please verify:

• Voltage: Your original battery must use a 3.7V nominal lithium-ion system.
• Connector: Confirm that the Mini-SPOX 3-pin connector matches your original battery connector.
• Connector Polarity: Verify the positive, negative, and temperature-sensor wire positions against your original battery.
• Dimensions: Ensure the replacement battery fits inside the speaker's battery compartment.
• Battery Configuration: This replacement uses two lithium-ion cells connected in parallel (1S2P), with a maximum charging voltage of 4.2V.

Note: The original part number INR18650-2S is used for identification. The electrical configuration of this Xain-USA replacement battery is 1S2P, not a 7.4V 2S series battery.

If you are unsure about connector compatibility or polarity, please contact Xain-USA and provide photos of your original battery and connector before ordering.

Warranty & Customer Support

ONE-YEAR U.S.-BASED WARRANTY

Covered by Xain-USA's one-year warranty and supported by our U.S.-based customer service team.

For assistance or battery connector compatibility questions, please contact service@xain-usa.com.

Xain-USA LLC – Your Powerhouse.

To ensure the longevity and safety of your lithium-ion (Li-ion) batteries, follow these care instructions:

• Avoid Extreme Temperatures
• Partial Charge is Better
• Avoid Overcharging
• Minimize Exposure to High Discharge Rates
• Store Properly When Unused
• Use Proper Chargers and Cables
• Keep Battery Contacts Clean

We ship our products using USPS Ground Advantage 2-5 Delivery. Please note that USPS may experience delays in its network.

Refer to your receipt email for the tracking code to view updates.

Warranty: Products advertised with a one-year warranty are covered against manufacturing defects. Check this listing for the applicable warranty. Contact our U.S.-based team with your order number and photos for a warranty or performance issue.

Standard returns: Request within 30 days of delivery. Items must be unused, uninstalled and complete in their original packaging; exclusions apply.

Return shipping: The buyer pays return shipping and prints the label. For a damaged, defective or incorrect item, contact us first to confirm the resolution and shipping arrangements. A prepaid label is not automatic.

Read the full return policy and warranty guidance or email support@xain-usa-marketplace.com.