4-Pack Vapcell V11 14650 1100mAh 3.7V 6A CDR Flat Top Battery – High-Drain Slim Cell for Specialty Flashlights, Micro Tools & Lasers
Description
Description
Unlock extreme power with this 2-pack of 21700 4000mAh 40A high-drain flat top batteries. Engineered for the most demanding devices, each cell delivers a true 40A continuous discharge and a solid 4000mAh capacity, making them the ultimate choice for high-wattage FET-driven flashlights, heavy-duty headlamps, and high-performance DIY projects. The flat top design ensures universal compatibility with spring-loaded contacts and simplifies spot-welding for custom battery packs. With ultra-low internal resistance and stable voltage output under load, these cells keep your devices performing at peak levels. When your gear demands serious power without compromise, this 2-pack delivers professional-grade performance every time.
Key Features
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40A True Continuous Discharge (CDR) – Massive, stable current for the most power-hungry devices. Handles sub-ohm builds, FET turbo flashlight modes, and high-power motor loads without dangerous voltage sag.
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4000mAh Solid Capacity – Optimized for high-drain applications. Provides dependable runtime while maintaining full 40A output capability throughout the discharge cycle. A practical balance between power and endurance.
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Flat Top Design – Universally compatible with all standard 21700 spring-contact chargers, flashlights, and battery trays. The flat positive terminal is ideal for spot-welding nickel strips in custom battery packs.
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Ultra-Low Internal Resistance – Minimizes heat generation and voltage drop under heavy loads, keeping your device cooler and ensuring maximum power delivery from start to finish.
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21700 Form Factor – The modern standard for high-power cells. Delivers significantly more capacity and current capability than 18650 alternatives while maintaining a manageable size. Always verify your device accepts 21700 cells before ordering.
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2-Pack Convenience – Perfect for dual-battery regulated mods, high-output flashlights, or keeping a charged spare ready for your high-drain device.
Parameters
| Parameter | Specification |
|---|---|
| Form Factor | 21700 |
| Chemistry | Lithium-Ion (standard 3.6V/3.7V) |
| Typical Capacity | 4000 mAh (0.2C discharge to 2.5V) |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge (CDR) | 40 A (cell temperature ≤ 80°C) |
| Max Pulse Discharge | Up to 50–60 A (short burst, 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 | ≤ 12 mΩ (AC 1 kHz, ultra-low) |
| Cycle Life | ≥ 250 cycles (to 80% capacity, high-drain cells have shorter cycle life) |
| Operating Temperature (Discharge) | -20°C to 60°C (ensure adequate cooling for sustained 40A) |
| Top Type | Flat Top |
| Dimensions | Approx. |
| 21.2 mm diameter × 70.3 mm length | Weight (single cell) | Approx. |
| 68 g | Package Includes | 2 × 21700 4000mAh 40A flat top cells in protective packaging |
Applications
Recommended For
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High-Wattage Vaping: Mechanical mods and high-wattage regulated devices running sub-ohm builds (safely down to ~0.10Ω at 3.6V). The 40A CDR provides a generous safety margin for demanding coils.
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FET-Driven High-Output Flashlights: Hot-rod torches and multi-emitter custom builds that demand 20–40A on turbo. Enjoy extreme brightness with rock-steady voltage and solid runtime.
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Heavy-Duty Headlamps: Professional and industrial headlamps that require sustained high current and long battery life.
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Cordless Power Tools (In BMS-Equipped Packs): Impact drivers, drills, and wrenches. The 40A rating handles start-up surges and sustained heavy loads with ease. Always use matched cells and a proper BMS.
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RC Cars, Boats & Airsoft: Competitive models requiring instantaneous 40A+ bursts for explosive starts and maneuvers.
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DIY High-Current Battery Packs: Spot welders, portable jump starters, and any project demanding reliable, ultra-high-rate discharge.
Not Recommended For
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Long-Runtime Low-Power Devices: Solar lights, camping lanterns, and wireless sensors. These benefit more from a 5000–6000mAh high-capacity 21700 cell.
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18650-Only Devices: The 21700 is physically larger (21mm diameter vs. 18mm). It will not fit in 18650 battery compartments.
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Applications Requiring Sustained >40A: For continuous currents above 40A, use dedicated ultra-high-drain cells or multi-parallel configurations.
FAQ
Q: Is this battery suitable for vaping? What resistance is safe?
A: Yes, this is an excellent cell for high-power vaping. With a 40A CDR at 3.6V nominal, it can safely handle builds down to approximately 0.10Ω, leaving a comfortable safety margin. Always calculate your actual current using Ohm's law and never exceed 40A continuous.
Q: Will this battery fit my 18650 device?
A: No. This is a 21700 cell, which has a larger diameter (21mm vs. 18mm for 18650). It will only fit in devices specifically designed for 21700 batteries. Always check your device's specifications before ordering.
Q: Is the 40A rating continuous or pulse?
A: The 40A is the Continuous Discharge Rating (CDR). The cell can handle short pulses up to 50–60A, but sustained operation must stay within the 40A limit. Never design your system based on pulse ratings for continuous operation.
Q: Can I build a power tool battery pack with these?
A: Yes, for high-drain tools like impact drivers and drills. The 40A continuous rating handles these applications well. Always use matched cells, spot-weld nickel strips (never solder directly to the cell), and install a properly rated BMS.
Q: How should I store these cells when not in use?
A: Store at 3.6–3.7V (approximately 40–50% charge) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.
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.