ASUS B31N1912 Replacement Laptop Battery | 11.55V 42Wh 3-Cell for VivoBook 14 E410MA E410KA L410MA L510MA E510MA Series
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🔋 ASUS B31N1912 / B31BjE1 exact replacement — covers VivoBook 14 E410MA, E410KA, L410MA, L410KA and VivoBook 15 E510MA, E510KA, L510MA, L510KA; the highest-volume ASUS consumer battery platform globally
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⚡ 11.55V / 42Wh / 3,640mAh, 3-cell Li-ion slim internal — Celeron N4020/N4500/N5100 platform optimized; true-rated capacity, no inflation
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📦 Volume supply infrastructure — this is our highest-turnover ASUS SKU; rolling finished-goods stock, consistent same-batch fulfillment on large orders
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🏭 Factory-direct wholesale — tiered bulk pricing, 3–5 business day standard dispatch
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🔌 ASUS EC pre-calibrated — charge percentage and cycle count report accurately on first boot, no driver intervention needed
Product Description
he B31N1912 holds a specific commercial position that no other ASUS battery in this catalog shares: it is the consistently top-selling ASUS laptop battery on Amazon globally, driven by the extraordinary volume of VivoBook 14 E410MA and E410KA units sold between 2020 and 2023. These machines were the default entry-level laptop recommendation across nearly every market — school programs, first-computer purchases, budget remote work setups. Tens of millions of units shipped. The battery replacement cycle on that installed base is now in full swing.
For wholesale buyers, that market context translates into one operational priority: supply consistency. The B31N1912 is not a battery you source opportunistically. It is a battery you set up a standing supply relationship for, because demand does not spike and trough — it runs at a steady, high baseline that repair shops and resellers need to fulfill week after week.
The E410 vs L410 vs E510 vs L510 — One Battery, Four Series Names
ASUS sells the same chassis under four series designations depending on distribution channel and regional market:
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E410 — standard consumer retail naming (global)
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L410 — education/commercial channel naming (primarily US, some APAC)
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E510 — 15-inch screen variant of the same platform
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L510 — 15-inch education/commercial channel variant
All four use B31N1912. The hardware is identical — same motherboard, same battery bay, same connector. The series letter simply reflects which distribution channel the machine was sold through. For repair shops receiving work orders with any of these model prefixes, B31N1912 is the correct battery across the board.
Celeron N-Series Platform — What It Means for Battery Behavior
The E410MA runs Intel Celeron N4020 or N4500, and the E410KA runs Celeron N4500 or N5100. These are ultra-low-power processors with a 6W TDP — fundamentally different power architecture from the Core i-series machines that dominate the rest of this catalog. The practical implication: the B31N1912 is not under the same peak load stress as a battery in a Core i7 or Ryzen 7 machine. Under normal use, these batteries last longer per cycle and degrade more slowly than higher-TDP platform batteries. For end users, this means realistic 8–10 hour runtime on a new replacement. For repair shops advising customers: the battery is rarely the cause of slow performance complaints on these machines — the processor is the bottleneck, not the power supply.
Compatible Models (Verified Against ASUS Service Documentation):
ASUS VivoBook 14 E410 Series: E410MA · E410MA-BV1500WS · E410MA-BV314WS · E410MA-EK026TS · E410MA-EK295TS · E410MA-EK1169TS · E410KA · E410KA-BV073WS · E410KA-EK283WS · E410KA-BV206WS
ASUS VivoBook 14 L410 Series: L410MA · L410MA-WS21 · L410MA-DB21 · L410MA-XS21 · L410KA · L410KA-DB21
ASUS VivoBook 15 E510 Series: E510MA · E510MA-BR198WS · E510MA-BR268WS · E510KA · E510KA-BR210WS · E510KA-BR282WS
ASUS VivoBook 15 L510 Series: L510MA · L510MA-WS21 · L510MA-DB21 · L510MA-RS21 · L510KA · L510KA-DB21
Compatible Part Numbers:
B31N1912 · B31BjE1 · 0B200-03800000 · 3ICP5/70/81 · C31N1912
Technical Parameters
| Parameter | Specification |
|---|---|
| Battery Model | B31N1912 (B31BjE1 / C31N1912) |
| ASUS Spare Part No. | 0B200-03800000 / 3ICP5/70/81 |
| Voltage | 11.55V nominal (3S Li-ion, compatible with 11.4V / 10.8V OEM spec) |
| Rated Capacity | 42Wh / 3,640mAh |
| Cell Configuration | 3-Cell (3S1P) Li-ion Slim Internal Pouch |
| Cell Chemistry | Lithium-Ion Polymer (Grade-A, fixed cell supplier pool) |
| Target Platform | Intel Celeron N4020 / N4500 / N5100 (6W TDP) — ultra-low-power architecture |
| BMS Protection | Overcharge / Over-discharge / Overcurrent / Short Circuit / Overheat / Cell Balancing |
| Cycle Life | ≥ 500 cycles @ 80% capacity retention |
| Expected Runtime (New) | 8–10 hours (Celeron N-platform, standard use) |
| Operating Temperature | Charge: 0–45°C · Discharge: -20–60°C |
| Storage Temperature | -20°C to 50°C (recommended: 15–25°C) |
| Self-Discharge Rate | ＜ 3% per month at recommended storage conditions |
| Shipping SOC | 40–60% (air transport compliant) |
| Certifications | CE / FCC / RoHS / UN38.3 |
| Warranty | 12 Months (manufacturing defects) |
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
✅ 📊 Highest-Volume ASUS SKU — Supply Infrastructure Built for It
The B31N1912 is our single highest-turnover ASUS battery platform. We maintain a minimum rolling stock position on this SKU specifically because the E410MA/L410MA installed base generates demand that does not follow a seasonal pattern — it is flat and high throughout the year. For distributors and repair chains placing weekly or biweekly replenishment orders, we offer a standing order program with locked per-unit pricing and guaranteed same-batch fulfillment on orders within our committed ATP quantity. Contact our sales team to set up a scheduled supply arrangement.
✅ 💻 Four Series Names, One Battery — Simplify Your SKU Catalog
E410, L410, E510, L510 — four ASUS series designations that all resolve to a single B31N1912 stock position. The series letter reflects distribution channel, not hardware specification. A repair shop stocking B31N1912 handles all four without maintaining separate part numbers. For distributors building ASUS battery catalogs for IT reseller customers, this consolidation is worth explicitly communicating — customers who think they need L410MA-specific stock actually need standard B31N1912, and correcting that confusion reduces their inventory fragmentation.
✅ 🔋 Celeron N-Platform Battery Behavior — Setting Accurate Customer Expectations
The E410MA and E410KA run 6W TDP Celeron processors. Battery degradation rates on these platforms are measurably lower than on Core i5/i7 machines under comparable use patterns — the low peak power draw means the cells operate within a narrower voltage range per cycle, reducing stress accumulation. A replacement B31N1912 in a well-maintained E410MA realistically delivers 8–10 hours on a single charge. For repair shops, this is a customer satisfaction advantage: battery replacements on low-power platforms tend to generate positive feedback because the improvement is dramatic and the new runtime matches or exceeds the original specification.
✅ 🏭 Production Depth for Consistent Reseller Supply
We run B31N1912 as a continuous production SKU rather than a batch-build item. Incoming cell lots are pre-approved against a fixed supplier specification, and each production run is documented by lot number on the Certificate of Conformance. For resellers who have experienced quality variance between orders from other suppliers — a known issue on high-volume commodity batteries where manufacturers substitute cell lots without notification — our fixed-supplier cell protocol means the battery your customer receives in month 6 performs the same as the sample you tested in month 1.
✅ 📦 Lightweight Chassis, Low Shipping Cost Per Unit
The B31N1912 is a slim 3-cell pack with a relatively low unit weight — a practical advantage for international distributors managing air freight costs on high-volume orders. At standard shipping SOC (40–60%), per-unit freight cost on the B31N1912 is lower than on 4-cell or high-Wh batteries of similar purchase price. For resellers calculating landed cost on bulk orders, this margin detail is worth factoring into your pricing model, particularly on trans-Pacific or trans-Atlantic routes where battery freight carries significant per-kg cost.
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: Does B31N1912 fit both the E410MA and the L410MA — are these the same machine?
Yes, they are the same hardware under different series names. ASUS uses the E-prefix for standard consumer retail channels and the L-prefix for education and commercial distribution channels. The motherboard, battery bay, connector, and B31N1912 specification are identical between E410MA and L410MA. The same applies to the 15-inch variants: E510MA and L510MA are the same hardware under different channel designations, both using B31N1912. A single B31N1912 stock position covers all four series without any compatibility risk.
Q2: What is the difference between B31N1912 and B31BjE1 — which part number should I use for procurement?
They are the same battery. B31BjE1 is an alternative ASUS internal labeling designation used on some production runs of the B31N1912 platform. For procurement documentation, use the ASUS spare part number 0B200-03800000 as the canonical reference — this is consistent across ASUS regional distribution systems globally and is the number that appears in HP service manuals for cross-referencing. The cell stack configuration code 3ICP5/70/81 also appears on the battery label and can serve as a secondary verification reference.
Q3: My customer says their E410MA is slow after battery replacement — is this a battery issue?
No. The E410MA runs an Intel Celeron N4020 or N4500 processor with a 6W TDP. Performance on these machines is processor-limited by design — ASUS built them for affordability and battery life, not performance. A new B31N1912 will restore runtime to 8–10 hours but will not change processing speed. If a customer reports slowness after battery replacement, the cause is either the processor architecture, thermal throttling from dust accumulation, or a full SSD. The battery is not a performance variable on this platform. Setting this expectation with customers before pickup prevents post-repair complaints that are actually complaints about the hardware design.
Q4: How do I verify incoming B31N1912 stock is genuine spec — the market has a lot of capacity-inflated listings?
The B31N1912 market does have a higher-than-average incidence of inflated capacity claims — some listings label at 4,000mAh or higher. The HP service specification is 3,640mAh at 11.55V. Verification method: discharge a sample at 0.5C with a lab charger. A genuine 42Wh pack returns 40–44Wh at room temperature. Units consistently returning below 38Wh are either underspecced or using degraded cells. For wholesale buyers placing first orders with a new supplier, a 5-unit sample discharge test before accepting the bulk shipment is the practical quality gate on this platform.
Q5: Can we set up a standing weekly or monthly supply arrangement for B31N1912?
Yes, and for this SKU specifically we recommend it. The E410MA/L410MA installed base generates flat, high-baseline demand year-round — repair shops and resellers who treat this as a spot-purchase SKU frequently face stock gaps during demand spikes. We offer a standing order program for the B31N1912 with locked per-unit pricing, committed ATP quantity, and guaranteed same-batch fulfillment within the committed window. Contact our sales team with your estimated weekly or monthly volume to structure a supply agreement. For accounts with predictable volume above a defined threshold, we can reserve production allocation in advance.
Q6: What documentation comes with bulk B31N1912 orders and how are warranty claims handled?
Each bulk shipment includes a Certificate of Conformance specifying cell lot number, production date, capacity QC results, and voltage verification parameters. Warranty is 12 months from shipment date covering manufacturing defects and capacity degradation below 70% of rated 42Wh. DOA claims require a photo of the defective battery label and brief failure description — return shipment is not required for individual units below our defined batch replacement threshold. Replacements dispatch within 5 business days of claim confirmation. For resellers managing high weekly order volumes on this SKU, we provide monthly batch-level QC summary reports on request to support your own supplier quality tracking.
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