2-Pack Vapcell N41 18650 4000mAh 10A Flat Top Battery – Max Capacity for Flashlights, Power Banks & DIY
Description
Description
Experience the absolute pinnacle of 18650 capacity with the Vapcell N41, delivering an unmatched 4000mAh in a standard 18650 form factor. This 2-pack provides a stable 10A continuous discharge, making it the ultimate power solution for devices where maximum runtime between charges is the top priority: high-output LED flashlights, high-capacity USB power banks, portable fans, solar lights, and DIY battery projects. The flat top design ensures broad compatibility with spring-loaded contacts and simplifies spot-welding for custom packs. With approximately 14% more energy than standard 3500mAh cells and Vapcell's rigorous cell matching, the N41 keeps your essential devices running longer—ideal for extended trips, off-grid applications, and anywhere frequent battery changes are impractical.
Key Features
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4000mAh Maximum 18650 Capacity – Currently the highest capacity available in a mass-produced 18650 cell. Delivers approximately 14% more runtime than 3500mAh cells and about 60% more energy than 2500mAh cells. The definitive upgrade for runtime-critical devices.
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10A Continuous Discharge – Provides stable, reliable power for most regulated LED flashlights, USB power banks, portable fans, and similar medium-drain devices. Sufficient for fast-charge protocols and bright flashlight modes without overheating.
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Flat Top Design – Universally compatible with all standard 18650 spring-contact chargers, flashlights, and battery trays. The flat terminal is ideal for spot-welding nickel strips in custom battery packs.
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Long Cycle Life – Retains over 80% of initial capacity after 500 charge/discharge cycles under recommended conditions, reducing long-term replacement costs.
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2-Pack Convenience – Build a compact 8000mAh power bank with two cells in parallel, keep a charged spare for your flashlight, or power your DIY project with confidence.
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Vapcell Quality Control – Each cell is tested and matched by Vapcell using authentic high-quality cells from major manufacturers, ensuring consistent capacity and low internal resistance batch after batch.
Parameters
| Parameter | Specification |
|---|---|
| Model | Vapcell INR18650 N41 |
| Cell Core | Ultra-high-capacity 18650 (based on latest generation 4000mAh cell technology) |
| Typical Capacity | 4000 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | ~3900 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge (CDR) | 10 A (cell temperature ≤ 75°C) |
| Max Pulse Discharge | Up to 15–20 A (short burst only, monitor temperature; not for continuous use) |
| Discharge Cut-off Voltage | 2.5 V (do not over-discharge) |
| Standard Charge | CC-CV, 0.5C (2000 mA) to 4.2 V, cut-off 50 mA |
| Max Charge Current | 1C (4000 mA); 0.5C recommended for best longevity |
| Internal Resistance | ≤ 35 mΩ (AC 1 kHz) |
| Cycle Life | ≥ 500 cycles (to 80% capacity, 0.5C charge / 1C discharge) |
| Operating Temperature (Discharge) | -20°C to 60°C |
| Top Type | Flat Top |
| Dimensions | Approx. |
| 18.4 mm diameter × 65.0 mm length | Weight (single cell) | Approx. |
| 49 g | Package Includes | 2 × Vapcell N41 18650 cells in protective packaging |
Applications
Recommended For
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LED Flashlights & Headlamps: The ultimate 18650 for users who demand the longest possible runtime. On medium modes, a 4000mAh cell can illuminate for days. Perfect for camping, search and rescue, professional inspection, and everyday carry where frequent battery changes are inconvenient.
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High-Capacity USB Power Banks: Build a massive 8000mAh power bank with just two cells in parallel. The 10A rating comfortably supports 18W–30W USB-C PD fast charging. Ideal for weekend trips, travel, and emergency preparedness kits.
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Portable Fans & Cooling Devices: Neck fans, handheld fans, and desk fans run significantly longer than with standard cells. A must-have for hot climates, outdoor events, and power outage situations.
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Solar Garden Lights & Street Lights: Low-current, all-night illumination. The 4000mAh capacity ensures consistent brightness from dusk until dawn, even after overcast days.
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Wireless Security Cameras & Smart Doorbells: Ultra-low standby power consumption with months of operation between charges. The extra 500mAh over standard 3500mAh cells provides a tangible real-world advantage.
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DIY IoT & Sensor Projects: Arduino, ESP32, and Raspberry Pi portable projects benefit from the massive energy reserve for extended field deployment without maintenance.
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Medical Devices & Portable Monitors: Reliable, stable power for equipment requiring uninterrupted operation within 10A limits.
Not Recommended For
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High-Power Vaping / Mechanical Mods (>10A): This is a 10A continuous discharge cell. Sub-ohm builds and high-wattage regulated mods typically require 15–35A continuous. Using the N41 will cause severe voltage sag, rapid overheating, and potential battery damage.
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Cordless Power Tools: Drills, saws, and impact drivers demand 15–40A continuous current. Use dedicated high-drain cells such as the Vapcell K30 (30A) instead.
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RC Cars, Drones & High-Drain Models: These require 20–30A+ continuous current. The N41 is engineered for maximum capacity, not extreme current delivery.
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FET-Driven Flashlights Exceeding 10A on Turbo: If your light's turbo mode pulls over 10A, select a higher-drain cell to avoid performance loss and potential damage.
FAQ
Q: What is the difference between the N41 and the previous N40 model?
A: The N41 represents Vapcell's latest batch and iteration of the 4000mAh cell series. While the core specifications (4000mAh / 10A CDR) remain the same, the N41 typically benefits from incremental improvements in internal resistance consistency and cycle life from ongoing manufacturing refinements. Both N40 and N41 deliver the same class-leading 4000mAh capacity.
Q: Is 4000mAh the real capacity? How much more runtime compared to 3500mAh?
A: Yes. The N41 uses an ultra-high-capacity cell core that delivers a true 4000mAh under standard test conditions. This provides approximately 14% more runtime than a 3500mAh cell. In practical terms, a flashlight that runs for 4 hours on high with a 3500mAh cell could run for about 4.5 hours with the N41.
Q: Can I use this battery for vaping?
A: No, not for high-power vaping. The N41 has a 10A continuous discharge rating (CDR). Most sub-ohm builds and high-wattage regulated mods require 15–35A continuous. Using the N41 will cause severe voltage sag, rapid overheating, and potential damage. For vaping, choose a dedicated high-drain cell like the Vapcell K30 (30A continuous).
Q: What devices are best suited for this cell?
A: Any device drawing under 10A where maximum runtime is the goal: LED flashlights on medium/high, USB power banks, portable fans, solar lights, wireless security cameras, smart doorbells, and long-running IoT sensor nodes. If you want to charge less often, this is the cell for you.
Q: What cell is inside the Vapcell wrap? Is it genuine?
A: Vapcell is a reputable rewrapper known for using authentic high-quality cells from major manufacturers. The N41 is based on the latest generation 4000mAh cell technology. Every batch is tested for capacity and internal resistance to ensure consistency and performance.
Q: Can I build a power bank with these?
A: Absolutely. Two N41 cells in parallel provide approximately 8000mAh—enough to fully charge most smartphones nearly two times. The 10A per cell rating easily supports 18W–30W USB-C PD fast charging. Combined with a quality power bank enclosure, this is one of the most compact high-capacity DIY power bank solutions available.
Shipping and Returns
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Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
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Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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Easy Returns: We want you to be completely satisfied. If you're not, you can return your product within 30 days of receiving your order. Please ensure the items are unused and in their original condition. For return instructions, please contact our support team.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Security
Refund Policy
OneAndes Return & Refund Policy
At OneAndes, we are committed to providing high-quality cylindrical lithium-ion batteries for your drones, vacuums, garden tools, and other power needs. If you are not completely satisfied with your purchase, we are here to help. Please read our full return policy below before initiating a return.
1. Return Window
You have 30 calendar days from the date you received your item(s) to request a return. Any return request submitted after 30 days will not be eligible for a refund or exchange.
2. Eligibility Conditions
To qualify for a return, all items must meet the following conditions:
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Condition: Items must be unused, undamaged, and in the same condition that you received them.
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Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
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Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
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Batteries that have been installed, used, or show any signs of wear.
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Items marked as “Final Sale” or “Clearance” at the time of purchase.
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Customized or special-order products.
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Gift cards.
If a returned item fails to meet these conditions, we reserve the right to deny the return or charge a restocking fee.
3. How to Initiate a Return
Follow these steps to return your product:
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Contact Us: Email our support team at support@oneandes.com with your order number and the reason for return. We aim to respond to all return requests within 24 hours on business days.
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Receive RMA: We will provide you with a Return Merchandise Authorization (RMA) number and return instructions. Do not ship any item without an RMA number.
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Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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Ship to Our US Warehouse: Ship the package to the following address:
OneAndes Returns
10320 6th St
Rancho Cucamonga, CA 91730
USA*Important: Lithium-ion batteries are classified as hazardous materials (Class 9). Please follow the shipping guidelines provided in Section 4 below. We recommend using a trackable shipping service and purchasing shipping insurance, as we cannot guarantee receipt of your returned item.*
4. Return Shipping Costs
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Defective or Incorrect Items: If the item you received is defective, damaged in transit, or different from what you ordered, OneAndes will cover the return shipping cost. In this case, we will provide you with a prepaid return shipping label.
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Buyer’s Remorse / Non-Defective Returns: If you are returning an item for any other reason (e.g., no longer needed, ordered the wrong model), you are responsible for the return shipping costs. You must prepay the return shipping cost using a trackable carrier that accepts lithium batteries. We do not provide prepaid return labels for non-defective returns.
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Lithium Battery Shipping Regulations: By law, all returns must be shipped in compliance with applicable dangerous goods regulations. We will provide guidance on proper packaging and labeling. Failure to comply may result in carrier refusal, seizure, or additional fees. We are not responsible for returned items lost or rejected by the carrier due to improper shipping.
5. Refunds
Once we receive and inspect your return at our Rancho Cucamonga, CA facility, we will notify you via email of the approval or rejection of your refund.
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Approved Refunds: If approved, your refund will be processed to your original method of payment within 5 to 10 business days. Please note that depending on your bank or credit card issuer, it may take additional time for the credit to appear on your statement.
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Partial Refunds: In certain situations, only partial refunds may be granted:
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Items not in original condition, missing parts, or damaged for reasons not due to our error.
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Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
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Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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Restocking Fee: We do not charge a restocking fee for defect-free returns, but we may deduct the return shipping cost, which will be deducted from your refund.
6. Exchanges
We replace items only if they are defective or damaged upon arrival. If you need to exchange a defective item for the same product, please contact us at support@oneandes.com. Exchanges are subject to product availability.
If you ordered the wrong battery size or model, please follow the standard return process above and place a new order for the correct item.
7. Damaged or Missing Items
If your package arrives visibly damaged, please take photos of the package before opening and contact us immediately. We will work with the shipping carrier to file a claim and arrange for a replacement or refund. Damaged or missing item claims must be reported within 7 calendar days of delivery. For immediate assistance, you may also call us at (213) 316-8849.
8. Order Cancellation
You may cancel your order without penalty if it has not yet been shipped. To cancel, email us at support@oneandes.com as soon as possible. If the order has already been processed or shipped, you will need to follow the standard return process upon receipt.
9. Warranty
All OneAndes batteries are backed by a 12-month limited warranty against defects in materials and workmanship. This warranty does not cover damage caused by misuse, improper charging, unauthorized modifications, normal wear and tear, or use outside of manufacturer specifications. For warranty claims, please contact our support team.
10. Contact Us
If you have any questions about our Return & Refund Policy, please reach out:
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Email: support@oneandes.com
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Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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Mailing Address: 10320 6th St, Rancho Cucamonga, CA 91730, USA
We aim to respond to all inquiries within 24 hours during business days. Please include your order number for faster assistance.