Asus C21N1518 38Wh Replacement Battery for VivoBook Flip TP501 Series
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🔋 OEM-Compatible: Matches original Asus C21N1518 specs — 7.6V, 38Wh, 2-cell Li-ion
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🏭 Factory Direct: Skip the middleman — competitive bulk pricing with full traceability
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✅ Certified: CE, FCC & RoHS compliant; Grade A cells with ≥300 charge cycles rated
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📦 Fits: Asus VivoBook Flip TP501, TP501UA, TP501UB, TP501UQ series
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🔄 B2B Ready: Flexible order quantities, sample testing available, 12-month warranty
Product Description
The C21N1518 is the factory-spec internal battery for the Asus VivoBook Flip TP501 convertible notebook line, released under the TP501 platform (2015–2017). This 2-cell Li-ion pack runs at 7.6V with a rated capacity of 38Wh (approx. 5000mAh), matching the original ASUS internal BMS protocol without requiring firmware intervention.
For repair depots, IT asset refurbishers, and laptop parts distributors, sourcing a reliable, drop-in C21N1518 replacement at volume pricing is the core supply concern — not specifications that are already locked by OEM design. Our factory inventory covers this SKU year-round, with consistent cell-grade sourcing from Tier-1 Li-ion cell manufacturers.
Verified Compatible Models (P/N Cross-Reference):
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OEM Part Numbers: C21N1518 · C21PQ91 · 0B200-01850000 · 0B200-01850000M · 21CP4/63/134
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Asus VivoBook Flip TP501 · TP501A · TP501U
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TP501UA · TP501UA-1A · TP501UA-CJ014T · TP501UA-CJ016T · TP501UA-CJ027T · TP501UA-DN023T · TP501UA-DN026T
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TP501UB · TP501UB-1A · TP501UB-DN010T · TP501UB-DN033T
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TP501UQ · TP501UQ-1A · TP501UQ-CJ019TC · TP501UQ-DN015T · TP501UQ-DN029T · TP501UQ-FZ026 · TP501UQ-FZ026T · TP501UQ-UB71T
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R518UA · R518UB · R518UQ · R518UQ-DS54T · R518UQ-RS54T · R518UQ-RS74T
Verification note: Cross-check the label on your existing battery against C21N1518, C21PQ91, or 0B200-01850000M before ordering at scale. Interface geometry and connector position must match the original.
Technical Parameters
| Parameter | Specification |
|---|---|
| OEM Part Number | C21N1518 / C21PQ91 / 0B200-01850000M |
| Battery Type | Li-Ion (Lithium-Ion) |
| Nominal Voltage | 7.6V (compatible with 7.5V systems) |
| Rated Capacity | 38Wh / 5000mAh (4840mAh min.) |
| Cell Configuration | 2-Cell |
| Color | Black |
| Dimensions | 225.72 × 185.0 × 4.74 mm |
| Weight | approx. 280g |
| Cycle Life | 300–500 charge cycles (to 80% capacity) |
| Protection Circuit | OVP / OCP / Short-Circuit / Thermal Protection |
| Certifications | CE / FCC / RoHS / ISO 9001 |
| Condition | 100% Brand New — Factory Fresh |
| Storage Temperature | –20°C to +45°C; Optimal at ~20°C, 40–50% charge state |
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
✅ 🔋 Grade A Li-Ion Cells — Rated Capacity Guaranteed
Every pack is built with Grade A 2-cell Li-ion cells sourced from verified suppliers. Capacity is pre-tested at the cell level before assembly — you get 38Wh nominal, not “up to 38Wh” marketing copy. Buyers pulling units for resale can expect consistent capacity reports across batches.
✅ 📋 Multi-Certification Compliance: CE, FCC, RoHS
Certification documentation (CE, FCC, RoHS) is available per shipment lot for customs clearance, platform listing requirements (Amazon, eBay, Newegg), and enterprise procurement audits. No chasing documents after the order ships.
✅ 🔌 Plug-and-Play Integration — No BMS Reset Required
The onboard protection circuit (OVP, OCP, short-circuit protection) communicates correctly with the TP501 system board. BIOS battery detection is immediate post-install — no EC reset procedures needed, reducing technician time per unit.
✅ 🏭 Factory-Direct Inventory — Stable Supply Chain
Stock is held at origin, not dropshipped through a broker. This means lead times are predictable (typically 3–7 business days for standard quantities), and batch QC reports can be issued per order. For high-volume distributors, scheduled blanket orders are supported.
✅ 📦 B2B Packaging Options
Units ship in neutral anti-static packaging by default. OEM-branded retail-ready box printing is available for resellers who require shelf-ready stock. Private label options including custom branding on the battery label can be discussed for qualified accounts.
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: Is the C21N1518 compatible with both TP501UA and TP501UQ models?
A: Yes. The C21N1518 / C21PQ91 pack is the single shared battery across the entire TP501 platform — TP501UA (Core i3/i5), TP501UB (with discrete GPU), and TP501UQ. The connector, footprint, and voltage are identical across all three sub-variants. Confirm by checking the P/N printed on your original battery before placing a volume order.
Q2: How many charge cycles does this battery support?
A: The C21N1518 is rated for 300–500 full charge cycles before capacity drops below 80% of nominal. In practical depot-refurb use, a unit seeing 1–2 cycles per day reaches end-of-life in roughly 12–24 months. For resale stock, ship fresh inventory and rotate regularly to maintain customer satisfaction.
Q3: Does this battery require any activation or calibration after installation?
A: No firmware activation. Install the pack, connect AC power, and the TP501 BIOS detects the battery immediately. For first-use conditioning, run 3–5 full charge/discharge cycles (charge to 100%, discharge to ~10%) to allow the cell chemistry to reach rated capacity. This is a normal Li-ion formation process, not a defect.
Q4: What certifications are included, and can I get documentation for customs?
A: Each production lot carries CE, FCC, RoHS, and ISO 9001 certification. MSDS / SDS sheets for UN38.3 air freight compliance are available on request. We can provide test report copies and COA documents per shipment — standard for platform compliance and import clearance in EU and North American markets.
Q5: What is the minimum order quantity, and are samples available?
A: Sample units are available for qualified buyers — request via the inquiry form and specify your target volume. For bulk orders, pricing tiers apply at multiple quantity brackets. We do not publish a fixed MOQ; order quantities are flexible and discussed based on your distribution channel and reorder frequency.
Q6: What is the lead time and warranty for bulk orders?
A: Standard stock orders ship within 3–7 business days from our warehouse. For large scheduled orders requiring dedicated production runs, lead time is 15–25 business days. All units carry a 12-month replacement warranty against manufacturing defects. DOA rate is below 0.5% based on production QC data — we provide replacement units, not refunds, for DOA claims on bulk orders.
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