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Power your demanding tools and devices with the 18500 3.7V 2000mAh 3C High-Drain Li-ion Battery (2-Pack). This premium cylindrical cell delivers exceptional performance with a massive 2000mAh capacity, stable 3C discharge rate, and ultra-low internal resistance (≤25mΩ). Whether you are repairing a cordless hair clipper, upgrading a tactical flashlight, or building custom power packs, this high-drain battery provides the reliable, sustained power you need.
To meet diverse installation and safety requirements, we offer 4 distinct versions in this single listing:
Flat Top (50mm): Bare cell with a flat positive terminal, ideal for spring-loaded contacts or spot-welding into battery packs.
Button Top (52mm): Features a raised positive terminal for secure connections in spring-compartment devices like flashlights.
Flat Top with Solder Tabs (52mm): Includes pre-welded nickel tabs for direct soldering onto motherboard PCBs.
Button Top with Built-in PCB (53mm): Features an integrated Protection Circuit Board (PCB) that prevents over-charge, over-discharge, and short circuits for maximum safety.
This is an 18500 battery with a large 18mm diameter. It will NOT fit standard 14mm (14500) or 16mm (16500) battery slots.
Please pay special attention to the height difference between the 4 versions:
| Version | Height | Description |
|---|---|---|
| Flat Top | 50mm | Shortest, fits standard slots. |
| Button Top | 52mm | +2mm for the raised terminal. |
| Flat Top with Solder Tabs | 52mm | +2mm for the welded tabs. |
| Button Top with Built-in PCB | 53mm | Tallest, includes the safety protection board. |
Please measure your device's internal battery compartment diameter and depth before ordering to ensure the correct version is selected.
Massive 2000mAh Capacity & 3C High-Drain Output: Delivers extended runtime and stable 3C discharge current, ideal for medium-to-high power devices like clippers and flashlights.
Ultra-Low Internal Resistance (≤25mΩ): Ensures minimal power loss and reduces heat generation during high-current usage.
4-in-1 Versatile Selection: One listing offers four connection styles (Flat Top, Button Top, Solder Tabs, and Built-in PCB) to fit any repair or DIY project.
Built-in PCB Safety (Select Version Only): The Protected version features a smart circuit to prevent over-charging, over-discharging, and short circuits.
Convenient 2-Pack: Comes with two identical batteries, perfect for dual-battery devices or keeping a reliable backup ready.
| Parameter | Specification |
|---|---|
| Model | 18500-2000 (Cylindrical Li-ion) |
| Capacity | 2000mAh |
| Energy | 7.4Wh |
| Nominal Voltage | 3.7V (Full Charge: 4.2V) |
| Discharge Rate | 3C |
| Internal Resistance (IR) | ≤25mΩ |
| Available Terminal Versions |
1. Flat Top (50mm Height) 2. Button Top (52mm Height) 3. Flat Top with Solder Tabs (52mm Height) 4. Button Top with Built-in PCB (53mm Height) |
| Diameter | 18mm |
| Weight | Approx. 33g |
| Rechargeable Cycles | 500+ cycles |
| Operating Temp (Discharge) | -20°C to +45°C |
Cordless Hair Clippers, Trimmers & Shavers
High-Performance LED Flashlights & Tactical Torches
Custom Battery Pack Building (Spot welding required for Flat Top)
Portable Power Tools & Small Motors
DIY Electronics & Home Appliance Repairs
Q: What is the difference between the 4 versions listed in this product?
A: They differ in the terminal style and height.
Flat Top (50mm): Bare cell, no tabs, fits flat contact plates.
Button Top (52mm): Raised positive terminal for spring-loaded compartments.
Flat Top with Solder Tabs (52mm): Pre-welded tabs for direct PCB soldering.
Button Top with Built-in PCB (53mm): Includes a safety protection board (tallest version).
Q: Is this battery compatible with my 14500 or 16500 device?
A: No. This is an 18500 battery with an 18mm diameter, which is much thicker than the 14mm (14500) or 16mm (16500) sizes. It will physically not fit into those slots.
Q: I chose the "Protected" version. Does it protect against over-discharge?
A: Yes. The version with the Built-in PCB features a Protection Circuit Board that prevents over-charging, over-discharging, and short circuits, making it much safer to use in devices without their own protection circuits.
Q: What does "3C discharge" mean?
A: 3C means the battery can safely discharge at a rate 3 times its capacity. For a 2000mAh battery, 3C equals a maximum continuous discharge current of 6000mA (6A). This makes it suitable for medium-to-high power tools.
Q: How long does it take to fully charge this battery?
A: It depends on your charger. With a standard 1A (1000mA) charger, it will take about 2.5 to 3 hours. We recommend using a dedicated 3.7V/4.2V Li-ion smart charger.
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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