39Wh Samsung AA-PBUN4AR Battery

Name: 39Wh Samsung AA-PBUN4AR Battery
SKU: Battery-US-Samsung-AA-PBUN4AR-39Wh
Availability: InStock

$70.00

Free Shipping | Installation tools included

Reliable battery for work, study, or travel.

Built-in protection: overcharge, over-discharge, short circuit, overcurrent & temperature safety.

Important Shipping Notice (Chinese New Year 2026 - Batteries)
During the Chinese New Year 2026 holiday period, laptop battery orders may take longer than usual to deliver. This delay is mainly caused by battery sourcing (most laptop batteries are manufactured in China) and holiday logistics congestion.

Estimated Battery Delivery Time
Please allow up to 30 days for delivery during this period.

If You Need a Battery ASAP
We completely understand that a working laptop is time-sensitive. If you need a battery urgently, please order with caution. For the fastest solution, you may prefer a local seller or another supplier that is not impacted during the holiday season. While we are sorry we may not be the quickest option for urgent cases, we will be genuinely happy if you can get your problem solved sooner.

If You are Not in a Hurry
If you can wait, you can place your order with confidence. It is very common to keep using a laptop with reduced battery runtime by plugging it in when needed. We will ship as soon as sourcing and logistics allow, keep your order moving, and deliver a high-quality, reliable battery that fits your device properly.

Thank you for your understanding and support.

SKU: Battery-US-Samsung-AA-PBUN4AR-39Wh Category: Battery for Samsung Tag: Samsung AA-PBUN4AR Battery

Description
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Description

Product Information

Item Condition: Brand New
Color: White
Capacity: 5120mAh/39Wh
Output Voltage (Volts): 7.7 Volts
Number of Cells:2 Cells
Package Included: 1 x Battery for Samsung
Warranty: 12 Months / 30-Day Return

Compatible Part Numbers (not all):
Samsung AA-PBUN4AR

Compatible Model Series (partial list):
Samsung 900X5L
Samsung 940X3L
Samsung ATIV Book 9 Spin 940X3L
Samsung Notebook 9 900X5L
Samsung Notebook 9 NP900X5L
Samsung Notebook 9 NP940X3L
Samsung Notebook 9 Spin 940X3L
Samsung NP900X5L Series

Premium 39Wh Battery for Samsung Notebook 9 & 9 Spin

Restore the legendary stamina of your ultrabook with our AA-PBUN4AR replacement battery. Precision-engineered for the Samsung Notebook 9 900X5L and the 360-degree 9 Spin (940X3L) series, this 7.7V battery utilizes high-density lithium-polymer technology to provide 39Wh of power in an ultra-slim 2-cell form factor.

Technical Specifications

Part Number	AA-PBUN4AR
Voltage	7.7 Volts
Capacity	5120 mAh / 39 Wh
Cell Configuration	2-Cell Lithium-ion Polymer
Condition	Brand New
Warranty	12 Months / 30-Day Return

Compatibility Checker

Specifically designed for the 13.3″ Spin and 15″ Notebook 9 chassis. Please verify your model number located on the bottom of your device.

Primary Compatible Part Number:

AA-PBUN4AR

Fits Laptop Models:

Samsung Notebook 9 900X5L
Samsung Notebook 9 Spin 940X3L
Samsung ATIV Book 9 Spin Series
Samsung NP900X5L Series
Samsung NP940X3L Series

Installation & Handling Guide

Precision Installation: This is an internal battery. Due to the ultra-thin magnesium chassis of the Notebook 9, please use a precision screwdriver and handle the bottom panel with care to avoid bending the light-weight alloy.
Connector Alignment: The 7.7V system requires a perfect electrical contact. Ensure the battery’s multi-pin plug is pushed straight into the motherboard socket. Do not apply force at an angle.
Optimization: For new polymer cells, it is recommended to perform 2-3 cycles of charging to 100% and discharging to 10% to ensure the OS accurately calculates the remaining runtime.

Frequently Asked Questions

Q: Does this battery fit the regular Notebook 9 13-inch (900X3L)?

A: No. The standard 900X3L (13-inch non-spin) uses a smaller 30Wh battery (AA-PBUN2TP). This AA-PBUN4AR is exclusively for the 940X3L Spin and the 15-inch 900X5L.

Q: Is the color of the battery casing important?

A: This unit comes in the standard white/light-grey casing as per original specifications. Since it is an internal battery, the color will not be visible once the laptop is reassembled.

Package Included: 1 x Brand New Battery for Samsung (AA-PBUN4AR)