LiitoKala 12.6V 1A Li-ion Battery Charger for 3S 18650/21700 Battery Packs - 100-240V Wide Voltage Input, DC 5.5×2.1mm Plug, Constant Current & Voltage Smart Charging (US/EU Plug Options)
Description
【Product Description】
The Perfect 1A Gentle Charger for Your 3S DIY Battery Packs! The LiitoKala 12.6V 1A Li-ion Battery Charger is specifically engineered for 3S (3-series) 18650 and 21700 lithium battery packs. Whether you're building a custom power station, an RC model battery, or a small-capacity portable power bank, this charger delivers safe, reliable, and gentle charging that maximizes battery lifespan.
Equipped with a 100-240V wide voltage input, this charger works globally with any standard wall outlet (US/EU plug options available). Its DC 5.5×2.1mm output plug is the industry standard for most DIY battery packs. Featuring Constant Current & Constant Voltage (CC/CV) charging and a stable 1A output, it ensures your battery pack is charged safely and efficiently without overheating.
( IMPORTANT: This charger is designed for 3S (12.6V) Li-ion battery packs ONLY. Do NOT use with 1S-2S or 4S+ battery packs. It is also NOT compatible with 3S LiFePO4 battery packs. Please check your battery pack's charging port size before ordering. This charger uses a standard DC 5.5×2.1mm plug.)
【Key Features】
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1A Gentle Charging: Ideal for small-capacity 3S battery packs, providing a safe and gentle charge that maximizes battery lifespan.
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Designed for 3S Battery Packs: Outputs 12.6V 1A, perfect for 3-series (3S) 18650 and 21700 lithium battery packs.
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100-240V Wide Voltage Input: Works globally with any standard wall outlet. Available in US and EU plug options.
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Constant Current & Constant Voltage (CC/CV) Charging: Provides safe, reliable charging that protects your battery pack and extends its lifespan.
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Standard DC 5.5×2.1mm Output Plug: The industry-standard connector for most DIY battery packs.
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Compact & Durable Design: Lightweight and portable, with built-in over-current and over-voltage protection.
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Certified Safety: CE and RoHS certified for safe, reliable performance.
【Parameters & Specifications】
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Brand: LiitoKala
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Model: Lii-126100
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Input Voltage: 100-240V AC, 50/60Hz, 0.5A Max
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Output Voltage: 12.6V DC
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Output Current: 1.0A
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Charging Method: Constant Current & Constant Voltage (CC/CV)
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Output Plug: DC 5.5×2.1mm
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Compatible Battery Packs: 3S (3-series) Li-ion battery packs (3S 18650, 3S 21700, etc.)
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Certifications: CE, RoHS
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Plug Options: US Plug / EU Plug
【Applications】
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DIY Battery Packs: Perfect for charging small-capacity custom 3S 18650/21700 battery packs for robotics and portable devices.
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RC Models & Drones: Reliable charging for small 3S Li-ion battery packs used in RC cars and drones.
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Portable Power Stations: Keeps your 3S portable power station fully charged and ready for outdoor adventures.
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Emergency Backup Power: Ensures your 3S backup battery pack is always ready for power outages.
【Frequently Asked Questions (FAQ)】
Q1: What battery packs is this charger compatible with?
A1: This charger is designed for 3S (3-series) Li-ion battery packs ONLY, such as 3S 18650 and 3S 21700 packs. Do NOT use it with 1S-2S or 4S+ battery packs, or with 3S LiFePO4 battery packs.
Q2: Does this charger come with a wall adapter?
A2: The charger itself includes a built-in AC plug (US/EU options available). Simply plug it directly into a wall outlet—no additional adapter is needed.
Q3: What is the output plug size?
A3: It uses a standard DC 5.5×2.1mm plug. Please check your battery pack's charging port size before ordering.
Q4: Can I use this charger for my 3S LiFePO4 battery pack?
A4: NO. This charger outputs 12.6V, which is designed for 3S Li-ion (4.2V per cell) battery packs. For 3S LiFePO4 (3.65V per cell), you would need a different charger with a lower output voltage.
Q5: What is the difference between this 1A charger and the 5A version?
A5: This 1A version provides a gentle, slower charge ideal for small-capacity battery packs, maximizing battery lifespan. The 5A version is designed for fast charging larger capacity packs.
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.
