XTAR SC2 2-Bay 3A Fast Smart Battery Charger | Type-C QC3.0 for 3.6V/3.7V Li-ion 18650 21700 Protected Cells
Description
Product Description
The XTAR SC2 is a highly efficient and ultra-compact 2-slot smart battery charger specifically designed for 3.6V/3.7V lithium-ion batteries. Powered by a QC3.0 Type-C input, it supports an impressive 3A maximum single-slot charging current, enabling you to fully charge a 3500mAh 18650 battery in just 1.5 hours—three times faster than standard 1A chargers. Featuring an intelligent power adaptation system, the SC2 automatically detects the input power source (5V/9V/12V) and adjusts the output current for optimal efficiency. With a clear LED indicator system and comprehensive safety protections, the XTAR SC2 delivers a fast, safe, and portable charging experience for your high-drain devices.
Key Features
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Ultra-Fast 3A Charging: Delivers a blazing 3A charging current for a single battery, drastically reducing charging time. Supports dual-slot 2A charging when charging two batteries simultaneously.
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QC3.0 Type-C Input: Equipped with a universal Type-C port supporting QC3.0 protocols (5V/3A, 9V/2A, 12V/1.5A), allowing you to power the charger via wall adapters, laptops, power banks, or USB outlets.
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Intelligent Power Adaptation: Built-in smart chip automatically recognizes the current of your power source and matches the optimal charging current for safe and efficient use.
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Clear LED Status Indicators: The intuitive LED lights indicate precise charging status: 1/2/3 lights flashing for 1A/2A/3A current; Rolling lights flashing for active charging; 4 lights solid for fully charged or standby; 4 lights flashing simultaneously for reverse polarity protection.
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Extensive Battery Compatibility: Specifically designed to accommodate 3.6V/3.7V Li-ion batteries, including sizes 18650, 18700, 20700, 21700, 22650, and 26650. Important: Supports charging protected 20700 and 21700 batteries securely.
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Comprehensive Safety Protection: Built-in short circuit protection, overcharge protection, reverse polarity protection, overcurrent protection, and overvoltage protection. Certified with CE, RoHS, and FCC standards, and insured by China Pacific Insurance.
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Portable & Lightweight: With a compact body measuring 105mm x 53mm x 27mm and weighing just 58g, it is ideal for EDC and travel use.
Product Parameters
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Model: XTAR SC2
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Input Power: QC3.0 Type-C (5V⎓3A / 9V⎓2A / 12V⎓1.5A)
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Constant Charging Current: 2A x 2 (Dual slot) / 3A x 1 (Single slot)
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Charging Cut-off Voltage: 4.20 ± 0.05V
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Charging Cut-off Current: ≤150mA
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Operating Temperature: 0 - 40°C
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Product Dimensions: 105mm (L) x 53mm (W) x 27mm (H)
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Net Weight: 58g
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Supported Battery Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR)
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Supported Sizes: 18650, 18700, 20700, 21700, 22650, 26650 (Supports protected 20700 & 21700)
Applications
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Fast charging for high-drain EDC tactical flashlights and searchlights.
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Reliable portable charging solution for outdoor headlamps and camping lanterns.
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Power maintenance for remote control (RC) hobbies, drones, and model aircraft.
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Compact emergency backup charger for power banks and DIY battery packs.
Frequently Asked Questions (FAQ)
Q1: What is included in the package?
A1: The package includes 1x XTAR SC2 Smart Charger, 1x Type-C Charging Cable, and 1x User Manual. (Batteries are sold separately).
Q2: Can the SC2 charge protected 21700 batteries?
A2: Yes. The XTAR SC2 features an extended slot design that comfortably accommodates protected 20700 and 21700 batteries, unlike many other compact chargers.
Q3: How do I achieve the 3A fast charging speed?
A3: To achieve the maximum 3A charging speed, use a single battery in one slot and ensure your power adapter supports QC3.0 (9V/2A or 12V/1.5A). The SC2 will automatically detect the input power and adjust to 3A.
Q4: What do the LED lights indicate?
A4: 1/2/3 blinking lights indicate the charging current is 1A/2A/3A. Rolling lights indicate the battery is charging. 4 solid lights mean it is fully charged. 4 flashing lights at once means the battery is inserted backwards (reverse polarity protection activated).
Q5: Is the SC2 safe to use overnight?
A5: Absolutely. The SC2 includes multiple safety protections including overcharge protection. Once the battery reaches the precise 4.20V cut-off voltage, charging will stop automatically to prevent overcharging.
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

I've tested the termination voltage with a multimeter¡ªalways 4.18-4.19V. Safe and reliable. The SC2 is my recommended travel charger.
I was worried my button top protected 18650s wouldn't fit, but the springs have enough travel. Charges them without crushing. Awesome device.
With a 45W charger, it really pushes 3A. The temperature stays low. The only downside is no voltage display, but I trust XTAR's termination.
I keep this on my nightstand. The LEDs are bright but not annoying. It revived a 0V cell, which impressed me. USB-C is the future.
My Fenix and Nitecore batteries charge fast on this. The automatic current selection is smart¡ªit never cooks my older cells.
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.
