2-Pack Vapcell F45 21700 4500mAh 20A CDR Flat Top Battery – Balanced for Flashlights, Power Tools & E-Bike
Description
Description
Get the best of both worlds with the Vapcell F45, a versatile 21700 cell that strikes the ideal balance between high capacity and usable current. This 2-pack delivers a solid 4500mAh capacity and a capable 20A continuous discharge, making it the go-to choice for users who need more runtime than pure high-drain cells but more power than standard high-capacity cells. It excels in high-output LED flashlights, light-to-medium cordless power tools, e-bike range extender packs, and regulated The flat top design ensures universal compatibility with spring-loaded contacts and simplifies spot-welding for custom battery packs. With approximately 12.5% more capacity than 4000mAh cells and 50% more current headroom than typical 10A high-capacity cells, the F45 is the all-purpose performer for your demanding devices.
Key Features
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4500mAh / 20A Balanced Performance – Combines a substantial 4500mAh capacity with a true 20A continuous discharge. Delivers significantly more runtime than 4000mAh high-drain cells while providing ample current for turbo flashlight modes, power tools, and moderate e-bike loads.
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20A Continuous Discharge (CDR) – Stable, reliable power output that handles FET-driven turbo modes, impact driver surges, and sub-ohm vaping builds (down to ~0.18Ω safely). Far more capable than 10A-limited high-capacity cells.
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Flat Top Design – Universally compatible with all standard 21700 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 – Perfect for powering a flashlight and a tool, building a compact e-bike pack, or keeping a spare ready for your high-drain device.
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Vapcell Quality Control – Each cell is tested and matched for consistent capacity and low internal resistance, ensuring reliable performance across the pack.
Parameters
| Parameter | Specification |
|---|---|
| Model | Vapcell F45 |
| Cell Core | Balanced 21700 (4500mAh / 20A class) |
| Typical Capacity | 4500 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | ~4400 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge (CDR) | 20 A (cell temperature ≤ 75°C) |
| Max Pulse Discharge | Up to 25–30 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 (2250 mA) to 4.2 V, cut-off 50 mA |
| Max Charge Current | 1C (4500 mA); 0.5C recommended for best longevity |
| Internal Resistance | ≤ 20 mΩ (AC 1 kHz) |
| Cycle Life | ≥ 500 cycles (to 80% capacity, 0.5C charge / 1C discharge) |
| Operating Temperature (Discharge) | -20°C to 60°C (ensure adequate cooling for sustained 20A) |
| Top Type | Flat Top |
| Dimensions | Approx. |
| 21.2 mm diameter × 70.3 mm length | Weight (single cell) | Approx. |
| 68 g | Package Includes | 2 × Vapcell F45 21700 cells in protective packaging |
Applications
Recommended For
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High-Output 21700 LED Flashlights: The 20A CDR comfortably handles FET-driven turbo modes while the 4500mAh capacity provides noticeably longer runtime than 4000mAh cells. Ideal for search and rescue, professional inspection, and outdoor enthusiasts.
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Light-to-Medium Cordless Power Tools: Impact drivers, drills, and wrenches benefit from the 20A surge capability and extended runtime. Perfect for rebuilding tool battery packs when used with matched cells and a proper BMS.
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E-Bike Range Extender Packs: In multi-parallel configurations, the 20A per cell supports 250W–500W motors, while the 4500mAh capacity delivers solid range. Always use a properly rated BMS.
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RC Cars, Boats & DIY High-Drain Projects: Instantaneous burst capability with the endurance of 4500mAh capacity for longer play or work sessions.
Not Recommended For
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Extreme Competition Vaping / Super-Sub-Ohm Builds (>20A Continuous): Requires 25–35A CDR. Choose the Vapcell T42 (35A) or K40 (30A) for builds below 0.15Ω.
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Heavy-Duty Power Tools (Angle Grinders, Rotary Hammers): These demand 30–40A continuous current. Use Vapcell T42 or dedicated ultra-high-drain cells.
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Ultra-Long Runtime Low-Power Devices (<5A): A 5000–6000mAh high-capacity cell like the Vapcell F60 or F50 will provide longer runtime for solar lights, sensors, and USB power banks.
FAQ
Q: How does the F45 compare to the Vapcell T42 or K40?
A: The F45 prioritizes capacity (4500mAh) with a solid 20A CDR—ideal for users who need more runtime and are willing to trade some peak current. The T42 (4200mAh/35A) and K40 (4000mAh/30A) prioritize maximum current for extreme applications. Choose the F45 if your device draws 15–20A and you want longer runtime; choose the T42 or K40 if you need 30A+ for competition vaping or heavy power tools.
Q: Can I use this battery for vaping? What resistance is safe?
A: Yes, for regulated mods and mechanical mods with builds drawing up to 20A continuous. At 3.6V nominal, this safely supports builds down to approximately 0.18Ω, leaving a comfortable margin. Always calculate your actual current using Ohm's law and never exceed 20A continuous.
Q: Can I build an e-bike battery with these?
A: Yes, but only in a multi-parallel configuration. A single F45 cannot provide enough current for most e-bike motors. Use at least a 3P or 4P configuration so each cell stays within the 20A limit. Always use matched cells, spot-welded nickel strips, and a properly rated BMS.
Q: Is this a high-drain or high-capacity cell?
A: It is a balanced cell that sits between the two categories. The F45 offers 12.5% more capacity than typical 4000mAh high-drain cells, and 100% more current capability than typical 10A high-capacity cells. It is designed for users who need both decent runtime and strong current delivery.
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
The Vapcell wrapper on the F45 has held up well to many insertions into various devices without any damage.
If you use one cell type for both flashlights and power tools, the Vapcell F45 is the best balanced 21700 available.
If you want one cell that can power everything from flashlights to power tools, the Vapcell F45 is the perfect balanced choice.
The Vapcell F45 offers the ideal combination of 4500mAh and 20A. Perfect for users who need both capacity and moderate high-drain capability.
My YR1035 meter measured IR at 14m¦¸ on both cells. Good performance for a cell offering both capacity and moderate high drain.
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.