TMR 18650 18.5V 4000mAh 1C Pre-Welded Li-ion Battery Pack – 2P5S Layout with Nickel Tabs for DIY Power Tools & Flashlights
Description
Product Description:
This TMR 18650 18.5V 4000mAh 1C Li-ion Battery Pack is a high-performance, pre-assembled power solution designed for DIY enthusiasts and professional retrofitting. Engineered in a 2 Parallel × 5 Series (2P5S) layout, it delivers a stable 18.5V output with a massive 4000mAh capacity, making it perfect for power-hungry 18V-class devices.
Constructed using genuine TMR 18650-2000mAh cells, this battery pack comes with nickel tabs already spot-welded in place, allowing for quick and hassle-free integration into your projects. Built with a multi-layer leak-proof design and a fully inspected secondary explosion-proof structure, it ensures maximum safety and durability. With an impressive 1500+ cycle life, this pack offers exceptional long-term value and reliability.
Key Features:
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Custom 2P5S Layout (18.5V 4000mAh): Features a 2 Parallel × 5 Series configuration, delivering a powerful 18.5V output and a high 4000mAh capacity for extended runtimes.
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Pre-Welded Nickel Tabs: Comes with nickel strips already spot-welded for easy connection. No need for complicated soldering or battery spot welding.
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Premium TMR 18650 Cells: High-quality, true-to-spec 2000mAh 3.7V cells from TMR with a stable 1C discharge rate.
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Multi-Layer Leak-Proof & Explosion-Proof Design: Features a fully inspected secondary explosion-proof design, bottom sealing cap, and safety heat-dissipation vents to rapidly release gas in extreme cases, preventing swelling or explosion.
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1500+ Long Cycle Life: Supports over 1500 recharge cycles. Economical, durable, and environmentally friendly.
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Mercury-Free & Eco-Friendly: Safe, non-toxic, and environmentally friendly battery construction.
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Stable Discharge Performance: Delivers consistent and stable voltage output, ensuring reliable power for your devices throughout the discharge cycle.
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Professional Quality Assurance: Manufactured by TMR, a trusted brand with rigorous quality control for long-lasting, dependable performance.
Product Parameters:
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Brand: TMR
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Configuration: 2 Parallel × 5 Series (2P5S)
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Total Voltage: 18.5V
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Total Capacity: 4000mAh
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Single Cell Model: 18650 Li-ion Battery
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Single Cell Capacity: 2000mAh
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Nominal Voltage: 3.7V
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Discharge Rate: 1C
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Internal Resistance: ≤50mΩ
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Cycle Life: ≥1500 times
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Weight (Total): Approx. 430g (based on 10 cells)
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Charge Temperature: 0°C to 45°C
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Discharge Temperature: -10°C to 60°C
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Charging Cut-off Voltage: 4.2V (per cell) / 21V (total pack)
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Tab Layout: Pre-welded nickel tabs for easy connection
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Safety Design: Multi-layer leak-proof, secondary explosion-proof, bottom sealing cap, safety heat-dissipation vents
Applications:
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High-Performance LED Flashlights: Reliable, high-capacity power for high-lumen tactical flashlights and outdoor searchlights.
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18V Cordless Power Tools: Ideal for retrofitting and powering cordless electric screwdrivers, drills, and other 18V-class DIY tools.
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RC Hobbies & Drones: Powers remote-controlled aircraft, heavy-lift drones, and large-scale RC car models.
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Outdoor Portable Power Stations: A core power module for building custom portable energy storage systems and outdoor power banks.
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Smart Home & Security Systems: Reliable backup power for high-power wireless sensors, security cameras, and smart doorbells.
Frequently Asked Questions (FAQ):
Q1: What does "2P5S" mean in this battery pack?
A1: "2P5S" means the pack is arranged in a 2 Parallel × 5 Series configuration. In simpler terms, it consists of 10 cells total: 5 sets of cells connected in series (to achieve 18.5V), with each series set having 2 cells connected in parallel (to achieve 4000mAh capacity).
Q2: Are the nickel tabs already welded to the batteries?
A2: Yes! The nickel tabs are pre-spot-welded for easy connection. There is no need for complicated soldering or spot welding equipment. You can connect them directly to your device's wiring.
Q3: What is the advantage of the multiple safety designs shown in the images?
A3: These battery packs feature a bottom sealing cap and safety heat-dissipation vents. Combined with a fully inspected secondary explosion-proof design, these features safely release internal gases in extreme conditions, effectively preventing battery swelling, leakage, or explosion.
Q4: How do I charge this 18.5V 4000mAh battery pack?
A4: You must use a charger specifically designed for 18.5V Lithium-ion battery packs. The charger must support a cut-off voltage of 21V. We recommend using a dedicated smart charger with over-charge protection for your specific 18.5V application.
Q5: Why should I choose this pre-welded pack over buying individual cells?
A5: Buying individual cells requires professional spot welding equipment and complex assembly skills, which is time-consuming and carries safety risks. This pre-welded pack eliminates the assembly work, ensuring correct battery alignment, proper connections, and immediate ready-to-use convenience.
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.