Fenix ARB-L18-3200 18650 3200mAh 5A 3.6V Button Top Protected Battery – for Flashlights, Headlamps & Mini Fans
Description
Description
Keep your everyday devices running longer with the genuine Fenix ARB-L18-3200, a protected 18650 button top battery that delivers dependable 3200mAh capacity at a practical price. Built for flashlights, headlamps, mini fans, and other daily-use electronics, it combines solid runtime with integrated overcharge, over-discharge, and short-circuit protection. The raised button top ensures reliable contact in Fenix, Streamlight, and most other major flashlight brands. With excellent cycle life and Fenix's trusted quality control, the ARB-L18-3200 is the sensible choice for users who want authentic Fenix safety and performance without paying for maximum capacity they may not need.
Key Features
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3200mAh Dependable Capacity – Provides solid, reliable runtime for medium-drain devices. An excellent everyday balance of performance and value for flashlights, headlamps, and portable fans.
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Built-in Protection Circuit – Safeguards against overcharge (4.2V cutoff), over-discharge (2.5V cutoff), short circuits, and overcurrent, protecting both the battery and your valuable devices.
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Button Top Design – Raised positive terminal ensures reliable electrical contact in Fenix, Streamlight, and most other 18650 flashlights and devices requiring a button top.
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Long Cycle Life – Retains over 80% of its initial capacity after 500 charge/discharge cycles, reducing long-term replacement costs.
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Fenix Genuine Quality – Manufactured to strict standards with premium protection circuitry for consistent, safe performance in daily use.
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Wide Compatibility – Ideal for single-cell LED torches, headlamps, mini fans, doorbells, camping lanterns, and other low-to-medium drain devices drawing under 5A.
Parameters
| Parameter | Specification |
|---|---|
| Model | Fenix ARB-L18-3200 |
| Cell Core | High-Capacity Li-Ion (Fenix specified, 3200mAh) |
| Typical Capacity | 3200 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | ~3100 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge | 5 A (limited by built-in protection circuit) |
| Protection Functions | Overcharge (4.2V cutoff), Over-discharge (2.5V cutoff), Short Circuit, Overcurrent |
| Discharge Cut-off Voltage | 2.5 V (automatic protection cutoff) |
| Standard Charge | CC-CV, 0.5C (1600 mA) to 4.2 V, cut-off 50 mA (use a quality Li-ion charger) |
| Internal Resistance | Approx. 60–80 mΩ (including protection circuit and button top) |
| Cycle Life | ≥ 500 cycles (to 80% capacity) |
| Operating Temperature (Discharge) | -20°C to 60°C |
| Top Type | Button Top |
| Dimensions | Approx. 18.6 mm diameter × 68.5 mm length (~3–4mm longer than standard unprotected flat top) |
| Weight (single cell) | Approx. 48 g |
| Package Includes | 1 × Fenix ARB-L18-3200 protected button top battery |
Applications
Recommended For
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LED Flashlights & Tactical Torches: Compatible with Fenix, Streamlight, and most other brands requiring a button top 18650. The 3200mAh capacity provides solid runtime for everyday carry, dog walking, or general household use.
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Headlamps for Outdoor & Home Use: Ideal for camping, running, DIY projects, and power outage preparedness. The protection circuit prevents over-discharge damage when lights are accidentally left on.
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Mini Fans & Portable Cooling Devices: Neck fans, handheld fans, and desk fans benefit from the 3200mAh runtime, keeping you cool for hours on a single charge.
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Smart Doorbells & Wireless Security Cameras: Many video doorbells use 18650 cells. The ARB-L18-3200 provides reliable runtime between charges with the safety of built-in protection.
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Camping Lanterns & Emergency Lights: Dependable power for weekend trips and home emergency kits. Built-in protection adds safety during long, unattended use.
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Bicycle Lights: Consistent output for daily commuting and recreational night riding.
Not Recommended For
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RC Cars, Drones & High-Drain RC Models: These require 10–30A+ continuous current. The 5A protection limit will cut power immediately and the battery will not function.
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High-Power Vaping / Mechanical Mods: Require 15–35A unprotected cells. The protection circuit cannot handle these loads.
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Cordless Power Tools: Drills, saws, and impact drivers demand 15–40A, far beyond this battery's 5A limit.
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Ultra-Compact Flashlights with Tight 65mm Battery Tubes: The protected button top design adds length (~68.5mm). Some compact lights may not close fully. Always verify your device can accommodate the extra length.
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Multi-Cell Series Packs: Individual protection boards may conflict. Use matched unprotected cells with an external BMS instead.
FAQ
Q: Is this battery compatible with my Streamlight / Fenix / other brand flashlight?
A: If your flashlight accepts 18650 batteries and requires a button top (raised positive terminal), then yes. The ARB-L18-3200 is compatible with most Fenix and Streamlight models, as well as many other major flashlight brands. Due to the protection circuit and button top, the battery is approximately 68.5mm long. Some ultra-compact lights with very tight battery tubes may not close properly. Please check your device's battery compartment length before ordering.
Q: Can I use this battery for RC cars or other high-drain devices?
A: No. RC cars, drones, and similar high-drain devices require 10–30A or more of continuous current. The ARB-L18-3200's protection circuit limits output to approximately 5A. Using it in such devices will cause the protection to immediately cut off power. For RC applications, please use dedicated high-drain unprotected cells.
Q: What does "protected" mean and why should I choose a protected cell?
A: A protected cell has a small circuit board added to the negative end that automatically prevents overcharge (above 4.2V), over-discharge (below 2.5V), short circuits, and excessive current draw. This makes single-cell use much safer, especially in devices without their own battery management. The trade-off is a slightly longer cell (68.5mm vs. 65mm) and a current limit of around 5A.
Q: How does the 3200mAh compare to 3500mAh cells?
A: The ARB-L18-3200 offers 3200mAh, which is about 9% less capacity than a 3500mAh cell. In practical terms, this might mean 15-20 minutes less runtime on high mode in a typical flashlight. For many everyday uses—walking the dog, household tasks, or casual camping—this difference is hardly noticeable, while the 3200mAh model offers a more accessible price point with the same genuine Fenix quality and protection.
Q: How should I charge this battery?
A: Use a quality lithium-ion battery charger with a CC-CV algorithm designed for 18650 cells. Fenix chargers are an excellent match. Charge at 0.5C (1.6A) for best longevity. The built-in protection circuit provides an additional safety layer, but a good charger is still essential.
Q: How should I store this battery when not in use?
A: Store at approximately 3.6–3.7V (40–50% charge) in a cool, dry place. Use a non-conductive battery case to prevent accidental short circuits. Avoid storing fully charged or fully 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
My headlamp and mini fan use these daily. No issues after hundreds of charge cycles.
I keep these as backups for my higher capacity cells. They hold charge well in storage.
If you want Fenix quality at a lower price, these 3200s are perfect. Protected and reliable.
These 3200mAh cells have the same build quality as the premium models. Protected circuit is identical.
I've been using these for over a year. After 250+ cycles, they still hold above 3000mAh.
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.