AA-PBUN4AR 7.7V 39Wh Samsung ATIV Book 9 Spin Battery — Wholesale Supply
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OEM P/N: AA-PBUN4AR; cross-references PBUN4AR, BA43-00375A, AAPBUN4AR, 2ICP5/43/93-2
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Specs: 7.7V · 5120mAh · 39Wh · Li-ion · Black
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Compatible series: Samsung ATIV Book 9 Spin (940X3L), Notebook 9 Spin (900X5L), Samsung 9 (NT900X5H / NT900X5L / NT900X5M / NT900X5P / NT900X5W / NT901X5L)
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Parts supply: Wholesale stock available; mixed-SKU orders accepted, low MOQ
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Wh tier positioning note: 39Wh is the standard capacity for the 940X3L and 900X5L Spin platform; the 2-cell pack geometry is chassis-specific and does not share fitment with 4-cell Samsung Notebook 9 Pro P/Ns at higher Wh ratings
Product Description
The AA-PBUN4AR replacement battery covers a distinct device population within the Samsung premium notebook lineup — the ATIV Book 9 Spin and Notebook 9 Spin, 2-in-1 convertible platforms that shipped with a dedicated 2-cell pack geometry incompatible with the 4-cell configurations used across the non-Spin Notebook 9 Pro range. At 7.7V and 39Wh, this unit matches the OEM specification for the NP940X3L and NP900X5L series.
The Samsung ATIV Book 9 Spin battery population extends across the NP940X3L US designation, the NP900X5L series, and a substantial NT-prefix Korean domestic market device group — NT900X5H, NT900X5L, NT900X5M, NT900X5P, NT900X5W, NT900X5WI, NT901X5L, and NT901X5LI — that represents a high proportion of active units in service accounts that source Samsung devices through regional distribution. Cross-reference codes BA43-00375A and 2ICP5/43/93-2 resolve to the same physical unit.
For depot and IT asset management accounts handling mixed Samsung premium-tier portfolios — where ATIV Book 9 Spin units, Notebook 9 Pro configurations, and Series 5 Ultra devices may all appear in the same service queue — AA-PBUN4AR occupies a distinct SKU slot that cannot be substituted from the adjacent Samsung premium-tier P/N family. Stocking it alongside AA-PBTN4LR and AA-PBVN3AB covers the core Samsung premium and mainstream battery populations without overlap.
Technical Parameters
| Parameter | Details |
|---|---|
| Battery Model | AA-PBUN4AR |
| Compatible Part Numbers | AA-PBUN4AR · PBUN4AR · AAPBUN4AR · BA43-00375A · 2ICP5/43/93-2 |
| Brand Compatibility | Samsung |
| Voltage | 7.7V (nominal) |
| Capacity | 5120mAh |
| Energy | 39Wh |
| Cell Type | Li-ion |
| Cell Configuration | 2-cell |
| Color | Black |
| Condition | Unused, OEM-compatible — new stock |
| Cycle Life | ≥500 charge cycles |
| Certifications | CE · FCC · RoHS |
| Warranty | 12 months |
| Package Includes | 1 × AA-PBUN4AR replacement battery · UN38.3 compliant packaging |
| Compatible Laptop Models | NP940X3L · NP940X3L-K01US · NP940X3L-K02CN · NP900X5L · NP900X5L-K01CN · NP900X5L-K02CN · NP900X5L-K02US · NT900X5H · NT900X5H-K23W · NT900X5H-K27S · NT900X5H-K28W · NT900X5H-K34D · NT900X5H-K34M · NT900X5H-K38W · NT900X5H-K39L · NT900X5L · NT900X5L-K24D · NT900X5L-K24H · NT900X5L-K24M · NT900X5L-K24P · NT900X5L-K24PH · NT900X5L-K24S · NT900X5L-K24W · NT900X5L-K25D · NT900X5L-K25M · NT900X5L-K25PS · NT900X5L-K25S · NT900X5L-K31G · NT900X5L-K34D · NT900X5L-K34S · NT900X5L-K38L · NT900X5L-K38PS · NT900X5L-K38S · NT900X5L-K38W · NT900X5L-K39L · NT900X5L-K39PS · NT900X5L-K39S · NT900X5L-K79S · NT900X5L-L24W · NT900X5L-L34M · NT900X5L-L38L · NT900X5LI · NT900X5M · NT900X5M-K58 · NT900X5M-K58WS · NT900X5M-K716 · NT900X5M-K78S · NT900X5M-KWSE · NT900X5M-L38S · NT900X5M-L58S · NT900X5M-L78S · NT900X5P · NT900X5P-KD2WS · NT900X5P-KD3S · NT900X5P-KD3WS · NT900X5P-KD5S · NT900X5P-KD5WS · NT900X5W · NT900X5W-K58S · NT900X5W-K58WS · NT900X5WI · NT901X5L · NT901X5LI |
| Application | Samsung ATIV Book 9 Spin / Notebook 9 Spin replacement battery — wholesale distribution, field service supply, institutional procurement |
| Supply Type | Manufacturer-direct supply · From stock; mixed orders welcome |
Need a stable supply plan? Send your model list + quantities + destination. We’ll confirm lead time, shipping method, and compliance documents before you place the order.
Features & Advantages
✅ 🔋 Fleet Cost Angle: What a 2-Cell 39Wh Pack Means Per Replacement Event
On the Spin chassis, the 2-cell 39Wh pack geometry was engineered to fit the convertible hinge architecture — a design choice that makes the battery non-interchangeable with larger-capacity Samsung units and means each Spin device in a fleet generates a discrete replacement event. A 500-cycle rating on this unit converts directly to a per-device replacement cost that can be modeled against the Spin’s typical three- to four-year active service window: at average daily usage, 500 cycles exceeds the expected service window for most institutional Spin deployments, meaning one replacement unit per device covers the full remaining lifecycle without a second event.
✅ 🔁 NP940X3L, NP900X5L, and Ten NT-Series Designations Under One SKU
AA-PBUN4AR satisfies battery demand across NP940X3L-K01US, NP940X3L-K02CN, NP900X5L-K01CN, NP900X5L-K02CN, NP900X5L-K02US, and ten NT-prefix Korean-market designations: NT900X5H, NT900X5L, NT900X5M, NT900X5P, NT900X5W, NT900X5WI, NT901X5L, and NT901X5LI. Cross-reference code 2ICP5/43/93-2 is the ICP cell designation that confirms the 2-cell pack architecture — a useful cross-check for service teams verifying the correct unit against device teardown records. For accounts where NP940X3L and NT901X5L devices appear in the same asset pool, one replenishment order covers both.
✅ ⚡ Samsung 9 Spin EC Architecture: BMS Protection Sequence and Authentication Pathway
The 940X3L platform’s embedded controller queries the battery at boot and on each power-state transition — sleep exit, hibernate resume, and AC reconnect. Short-circuit interrupt and over-discharge protection operate at the cell level first, holding the pack within the voltage envelope the Spin EC expects before the authentication layer is engaged. Overcharge cutoff prevents cell voltage from exceeding the upper limit the 940X3L charge circuit monitors; if the BMS does not respond within the EC’s expected window at any power-state transition, the platform presents a “battery not detected” event rather than a charge-suspend state — making the authentication timing of this unit’s BMS a critical fit criterion that distinguishes compatible from incompatible aftermarket units on this chassis.
✅ 📦 Fleet Rollout Sequencing for Mixed Samsung Spin and Pro Portfolios
IT asset managers deploying battery replacements across a Samsung fleet that includes both Spin (940X3L / 900X5L) and Pro (940X5M / 940X3M) configurations need two distinct SKUs — AA-PBUN4AR and AA-PBTN4LR respectively — that do not share physical fitment. Wholesale orders for both P/Ns can be placed simultaneously against a single consolidated purchase request, with fulfillment from stock for each. Structuring the Spin and Pro battery replenishment as a single order event reduces the number of receiving transactions and incoming QC steps in a fleet rollout sequence. Mixed-SKU orders across Samsung lines accepted; low MOQ supports staged fleet rollout without full-volume commitment upfront.
✅ 🌐 2-Cell Pack Identification: Preventing Cross-Platform Ordering Errors at the Depot Level
The 2ICP5/43/93-2 cell code on AA-PBUN4AR is the fastest field-level identifier that distinguishes this unit from 4-cell Samsung Notebook 9 Pro and Series 5 Ultra batteries at the depot receiving stage. Wholesale resellers building Samsung battery catalogs and depot technicians receiving mixed-SKU Samsung orders can use the ICP designation as a cross-check: any unit presenting a 4ICP prefix — including AA-PBUN4NP (4ICP6/60/80) and AA-PBTN4LR (4ICP5/43/97) — is a non-Spin platform unit and will not fit the 940X3L or 900X5L chassis. This single-field verification step eliminates the most common Samsung premium-tier cross-platform installation error before a technician reaches the device.
Packing & Delivery
Lead Time & Shipping
In-stock items: Ship within 3 days
For standard replacement models with available inventory.Mass production orders: Ship within 7 days
For regular models under confirmed specifications and packaging requirements.Customized orders: Ship within 15 days
For custom cell configuration, size, wire/connector, PCB/BMS, labeling, or packaging.
Note: Final dispatch time depends on total quantity, model complexity, packaging requirements, and shipping compliance documents. We will confirm the estimated shipping date (ETD) after order confirmation.
Air freight (urgent, smaller volume)
Sea freight (cost-effective for bulk)
Rail / Truck (subject to destination)
Express channels
Documents available: UN38.3 / MSDS / Transport Test Report (if applicable)
Compliant packaging and carton labeling can be arranged based on the chosen shipping method.
EXW / FOB / CIF / DDP available
FAQ
Q1: The 2ICP5/43/93-2 designation appears in some parts databases alongside AA-PBUN4AR — what does the ICP code indicate and how should procurement teams use it?
A1: The 2ICP5/43/93-2 designation is the IEC cell configuration code for this battery pack. The leading “2” identifies the 2-cell architecture; “ICP” designates the Li-ion prismatic cell format; “5/43/93” describes the cell dimensions. For procurement teams verifying correct battery identification at the receiving stage, this code provides a hardware-level cross-check that operates independently of the P/N string — if a unit arrives presenting a 4ICP prefix, it is a different cell configuration and does not fit the 940X3L or 900X5L chassis regardless of what P/N string appears on the label. Purchasing systems that log ICP codes alongside P/Ns can use 2ICP5/43/93-2 as a secondary identifier for AA-PBUN4AR across all compatible device records.
Q2: Some parts databases show this battery under both “ATIV Book 9 Spin” and “Notebook 9 Spin” designations — are these the same hardware or different products requiring separate qualification?
A2: These are the same underlying hardware platforms under two naming generations. Samsung renamed the ATIV Book 9 Spin lineup to Notebook 9 Spin in 2015–2016 without changing the chassis architecture or battery specification for the 940X3L and 900X5L series. The battery bay, connector, and EC charge profile are identical across both naming periods. Procurement teams that have both ATIV Book 9 Spin and Notebook 9 Spin records in their asset management systems can consolidate both entries to a single AA-PBUN4AR stock position with no separate compatibility qualification required.
Q3: Does AA-PBUN4AR fit the NT901X5L series? These devices appear frequently in Korean-market procurement records but are listed inconsistently across parts databases.
A3: NT901X5L is confirmed compatible with AA-PBUN4AR. The NT901X5L is a Korean domestic revision of the NP900X5L — same chassis, same battery bay, same EC charge profile — sold through Samsung’s direct and carrier retail channels in Korea. Parts database inconsistency for NT901X5L typically traces to the large number of sub-model suffixes (NT901X5L-K27/R, NT901X5L-K301S, NT901X5L-EXCU1, etc.) that some databases list individually rather than at the series level. All NT901X5L sub-models confirmed compatible with AA-PBUN4AR share the same battery specification as the main NP900X5L series.
Q4: After installing AA-PBUN4AR in a Notebook 9 Spin 940X3L, the system powers on but shows “Battery not detected” — what is the correct diagnostic path?
A4: On the 940X3L platform, a “battery not detected” state at first boot after installation indicates the embedded controller has not completed its power-state battery query cycle with the new unit. The 940X3L EC queries the battery at boot and again at each power-state transition — this sequence must complete before the battery is registered. First, confirm the battery connector is fully seated; partial engagement on this 2-cell pack connector is the most common installation cause of the non-detection state on this chassis. If connector seating is confirmed, perform a full EC drain: power off, disconnect AC, hold the power button for 30 seconds, reconnect AC, and cold-boot. The EC initializes a fresh battery session on the next power-on cycle and the detection state resolves.
Q5: We stock multiple Samsung battery lines for a service account that includes both Spin and Pro configurations — what is the ordering path for combining AA-PBUN4AR with other Samsung P/Ns?
A5: Open the ordering path this way: compile the full P/N list covering all Samsung battery lines in the replenishment — AA-PBUN4AR alongside any Pro, Series 5, or ATIV Book lines — and submit as a single request with quantities per SKU. We’ll return a single consolidated quote covering the combined order. Low MOQ applies across the combined Samsung battery line without per-P/N minimums. For wholesale reseller accounts running standing Samsung service contracts, we can configure recurring order terms. Send the parts list to initiate.
Q6: Can AA-PBUN4AR be used in the Samsung 940X3K? This model appears in some service records under similar part number references.
A6: The 940X3K is a separate chassis — the ATIV Book 9 Lite — which uses a different battery form factor, voltage, and connector from the 940X3L Spin. The 940X3K runs an 11.4V / 30Wh or 11.4V / 44Wh pack depending on the specific sub-configuration; AA-PBUN4AR at 7.7V will not engage the 940X3K charge circuit and does not physically fit the 940X3K battery bay. Service records that group 940X3K and 940X3L together under similar part references likely originate from a database that did not differentiate the Spin and Lite chassis lines. Stock AA-PBUN4AR for 940X3L Spin devices only; 940X3K requires a separate P/N.
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