ASUS B31N1631 Replacement Battery — 42Wh 11.55V 3-Cell for VivoBook 15 X505BA X505BP X505ZA & S505 Series
-
🔋 Direct OEM replacement for ASUS B31N1631 — engineered to match factory voltage, capacity, and connector spec without modification
-
📦 Broad model coverage: fits VivoBook 15 X505BA, X505BP, X505ZA, F505BA, S505BA, S505ZA series and 40+ sub-models
-
⚡ 11.55V / 42Wh / 3727mAh, 3-cell Li-ion — true-rated capacity, no inflated figures
-
🏭 Factory-direct B2B supply: tiered wholesale pricing, mixed-SKU orders accepted, consistent batch quality
-
📋 P/N coverage: B31N1631, 0B200-02510000, 0B200-02510200, 0B200-02510500, 3ICP5/57/81
Product Description
The B31N1631 is the factory-designated 3-cell battery for ASUS’s mid-range VivoBook consumer line — the X505, F505, S505, and R504 families — launched from 2017 onward and still actively deployed in school and SME fleets today. These machines continue to generate strong repair and fleet-refresh demand because they were procured in large volumes at launch and are now hitting their first major battery replacement cycle.
Our B31N1631 production line maintains dimensional and electrical tolerances within ±1% of the original ASUS specification: 11.55V nominal, 42Wh rated capacity, 3727mAh, 3-cell Li-ion polymer architecture. Every pack ships pre-tested at ≥95% of rated capacity.
Compatible Models & Part Numbers
Verified compatible OEM part numbers: B31N1631 / 0B200-02510000 / 0B200-02510200 / 0B200-02510500 / 3ICP5/57/81 / B31BI2H / B31BI9H
Compatible laptop series (verified against ASUS service documentation):
| Series | Key Models |
|---|---|
| VivoBook 15 X505BA | X505BA-1A/1B/1C/3F/3G, X505BA-RB94, X505BA-BR016T |
| VivoBook 15 X505BP | X505BP-1A/1B/1C/3F/3G, X505BP-BR007T |
| VivoBook 15 X505ZA | X505ZA-BB31, X505ZA-BQ013T, X505ZA-AS2502T, X505ZA-BG879T |
| VivoBook 15 F505BA/BP/ZA | F505BA-BR036T~BR038T, F505BP-EJ156T, F505ZA-BQ072T |
| VivoBook S505 | S505BA-BR033T, S505BP-BR013T, S505ZA-EJ484T, S505ZA-BR225T |
| VivoBook S14 S410UN | S410UN-EB065T, S410UN-NS74, S410UN-EB143T |
| VivoBook 17 X705MA | X705MA-BX124T, X705MA-BX162/163, X705MA-BX171T/179T/186T |
| R504 / A505 | R504BA, R504ZA-BQ064T/135T, A505BA, A505BP, A505ZA |
Technical Parameters
| Parameter | Specification |
|---|---|
| Battery Model | B31N1631 |
| Nominal Voltage | 11.55V (compatible: 11.52V / 11.1V) |
| Rated Capacity | 42Wh / 3727mAh |
| Cell Configuration | 3-Cell (3S1P) |
| Cell Chemistry | Li-ion / Li-Polymer |
| Cell Grade | Grade A — ≥95% rated capacity on delivery |
| Cycle Life | 500+ full cycles to ≥80% capacity retention |
| OEM Part Numbers | B31N1631, 0B200-02510000, 0B200-02510200, 0B200-02510500, 3ICP5/57/81, B31BI2H, B31BI9H |
| Connector Type | OEM-matched, direct plug-in replacement |
| Color | Black |
| Condition | Brand New — 0 cycles |
| Operating Temp. | 0°C ~ 45°C (charge) / -20°C ~ 60°C (discharge) |
| Storage Temp. | -20°C ~ 25°C, ≥50% charge state recommended |
| Certifications | CE, RoHS, UN38.3 |
| Warranty | 12 months |
| Supply Mode | Factory Direct — FOB / CIF / DDP available |
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
✅ 3-Cell Li-ion Pack Built for High-Cycle Repair Demand
This battery sees heavy throughput in computer repair chains and IT asset management programs because it covers five distinct VivoBook series with a single SKU. For repair shops running AMD A-series VivoBook models from 2017–2019, this is a non-negotiable stock item. Our cells deliver 500+ full charge cycles before falling below 80% capacity retention — consistent with what an experienced repair technician expects from a credible replacement.
✅ True Capacity, Verified — Not Spec-Sheet Marketing
Rated 42Wh / 3727mAh at 11.55V. Each production batch is pull-tested at ≥95% of rated capacity before shipment. We don’t pad spec sheets: the battery you receive draws the same wattage as the original ASUS pack on system diagnostics. This matters to B2B buyers whose customers will notice — and return — a substandard unit.
✅ Single-SKU Coverage Across 40+ VivoBook Sub-Models
The B31N1631 footprint, connector type, and BMS pinout are shared across the X505, F505, S505, and select S410/X705 series. Stocking one SKU covers a substantial portion of AMD-platform VivoBook repair volume. Distributors and repair wholesalers report this as one of the top-10 ASUS battery SKUs by unit velocity.
✅ Stable Production Supply for Repeat B2B Orders
We maintain continuous cell inventory and finished pack stock specifically for legacy ASUS models with sustained aftermarket demand. Lead time on repeat orders: 3–5 business days ex-factory. Mixed-brand pallet orders are accommodated — no requirement to fill a full carton with a single model.
✅ OEM-Grade Build Materials
Connector housing uses PA66 flame-retardant nylon. PCB protection circuit runs independent over-voltage, over-current, and temperature cutoff — not a shared cell BMS. Cell tabs are laser-welded, not spot-welded with loose contacts. These are the construction details that differentiate a battery lasting 18 months in service from one returned after three.
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: How long does the ASUS B31N1631 replacement battery last per charge?
Under mixed workloads (web browsing, office apps, moderate brightness) on AMD A-series VivoBook hardware, runtime typically falls between 3.5 and 5 hours — consistent with the original ASUS 42Wh pack. Actual runtime depends on CPU load, screen brightness, and background processes. Battery health stays above 80% rated capacity for 500+ full charge cycles under normal use conditions.
Q2: Is the B31N1631 compatible with VivoBook S14 S410UN models?
Yes — the S410UN-EB065T, S410UN-NS74, and S410UN-EB143T are confirmed compatible. Verify by checking the label on your existing pack: if it shows B31N1631, 0B200-02510000, 0B200-02510200, or 3ICP5/57/81, this battery is a direct replacement.
Q3: Does the B31N1631 battery need to be calibrated or activated after installation?
No special activation procedure is required. Install the pack, connect the AC adapter, and charge to 100% before the first use. The onboard BMS communicates with the ASUS EC firmware automatically — the system will display accurate charge percentage from the first boot.
Q4: What is the minimum order quantity (MOQ) for wholesale B31N1631 batteries?
We accommodate small and large B2B orders alike — no fixed minimum is required for initial sample or trial orders. Mixed-model pallet orders are supported. Contact us for tiered pricing by volume; we provide factory quotes with lead time confirmation within 24 hours.
Q5: What part numbers are interchangeable with B31N1631?
All of the following are functionally interchangeable: B31N1631, 0B200-02510000, 0B200-02510200, 0B200-02510500, 3ICP5/57/81, B31BI2H, B31BI9H. These designations appear across different ASUS regional markets for the same physical pack. If your existing battery shows any of these numbers, our replacement fits.
Q6: What are the shipping and lead time options for bulk orders?
Standard production lead time is 3–5 business days ex-factory for stock models. We ship FOB, CIF, and DDP. Express courier (DHL/FedEx) is available for orders under 100 units. For larger freight shipments, we coordinate with your forwarder directly. Sample units ship within 24 hours of order confirmation.
Related Products
Looking for more laptop battery models for distribution? Browse our wholesale laptop battery category for bulk supply and factory pricing.
