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Power Your High-Demand Devices with Confidence!
The INR18650-20R4 is a high-performance lithium-ion cell engineered for high-drain applications. Featuring a nominal capacity of 2000mAh and an impressive 10C (20A) continuous discharge rate, this battery delivers robust power with ultra-low internal resistance of just 14mΩ. Whether you are powering a high-intensity tactical flashlight, a high-wattage power tools, or building a custom battery pack, the INR18650-20R4 offers reliable, consistent energy.
We offer four variants to match your specific assembly needs:
Flat Top: Standard flat contact, fits most general battery compartments with spring-loaded contacts.
Button Top: Features a raised positive contact, perfect for flashlights and devices that require this specific geometry.
Spot Welded: Comes with nickel strips pre-welded, saving you the hassle of spot welding for your DIY battery pack projects.
Pre-wired: Comes with high-quality silicone wires pre-soldered (Red/Black), ready for plug-and-play connection.
High Discharge Rate: 10C continuous discharge (20A max), delivering strong power output with minimal voltage sag.
Ultra-Low IR: Internal resistance of only 14mΩ±3, ensuring minimal heat generation and maximum device efficiency.
Built for Safety: Features a built-in pressure relief vent and stable chemical formulation for safe operation.
Versatile Configurations: Available in Flat Top, Button Top, Spot Welded, and Wired versions to suit any project.
Model: INR18650-20R4
Chemistry: Li-ion
Typical Capacity: 2000mAh
Minimum Capacity: 1900mAh
Nominal Voltage: 3.6V
Charge Cut-off Voltage: 4.2V
Max Continuous Charge Current: 4A
Max Continuous Discharge Current (10C): 20A
Discharge Cut-off Voltage: 2.5V
Internal Resistance: 14mΩ ± 3
Dimensions (Flat Top): 18mm x 65mm
Net Weight: Approx. 44g
High-Intensity Flashlights & Headlamps (Recommended: Button Top)
Cordless Power Tools & Electric Screwdrivers (Recommended: Flat or Welded)
RC Cars, Drones, and Airplanes (Recommended: Welded or Wired)
DIY Power Banks & Custom Battery Packs (Recommended: Spot Welded)
Q1: What's the difference between Flat Top and Button Top, and which should I choose?
A: Flat Top cells have a flat positive terminal, suitable for devices with built-in spring contacts. Button Top cells have a raised nub on the positive terminal, specifically designed for flashlights that require this extra height. Please check your device's battery compartment depth before purchasing.
Q2: Can I use the "Spot Welded" or "Wired" versions directly?
A: Yes. The wired version comes with pre-soldered leads for easy connection to your BMS or device. The spot-welded version is ideal if you plan to solder them into a custom battery pack. Important: Ensure correct polarity connection and avoid short circuits at all times.
Q3: Is this a suitable replacement for standard 20R batteries?
A: Yes, the INR18650-20R4 is a direct equivalent to the classic 20R cell, with matching capacity, discharge rate, and internal resistance parameters.
Safety Warning:
Do not throw into fire, water, or attempt to disassemble.
Always charge using a professional charger with overcharge protection.
Never over-discharge (below 2.5V) or overcharge (above 4.2V).
Do not short-circuit the positive and negative terminals.
Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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.
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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:
Condition: Items must be unused, undamaged, and in the same condition that you received them.
Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
Batteries that have been installed, used, or show any signs of wear.
Items marked as “Final Sale” or “Clearance” at the time of purchase.
Customized or special-order products.
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:
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.
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.
Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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
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.
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.
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.
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.
Partial Refunds: In certain situations, only partial refunds may be granted:
Items not in original condition, missing parts, or damaged for reasons not due to our error.
Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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:
Email: support@oneandes.com
Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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.
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