XTAR MC4S 4-Bay Smart Battery Charger | Type-C Input for 3.6V/3.7V Li-ion 18650 21700 & 1.2V Ni-MH AA AAA Batteries
Description
Product Description
The XTAR MC4S is a compact, lightweight, and highly versatile 4-slot smart battery charger designed for both 3.6V/3.7V Li-ion and 1.2V Ni-MH/Ni-CD batteries. Equipped with a universal Type-C input, it features four fully independent charging circuits that intelligently identify battery types and automatically switch to the optimal charging strategy. With clear LED indicators, built-in 0V activation to revive over-discharged batteries, and precise charging algorithms, the MC4S provides a safe and efficient charging experience. Please note the physical slot limitations for longer batteries: Slots CH1 and CH4 can accommodate batteries up to 26650 size, while Slots CH2 and CH3 support batteries up to 21700 size. Important: This charger does NOT support protected 20700 and 21700 batteries.
Key Features
-
4 Fully Independent Charging Slots: Supports mixed charging of Li-ion and Ni-MH/Ni-CD batteries simultaneously without mutual interference.
-
Smart Battery Type Identification: Automatically recognizes the battery type and applies the most suitable charging strategy (TC-CC-CV for Li-ion; precise 0ΔV and -ΔV cut-off for Ni-MH/Ni-CD) to ensure full charge and battery protection.
-
Intuitive LED Indicator Lights: Features simple and clear LED status lights. Solid Red indicates charging or activation; Solid Green indicates fully charged, empty slot, or poor contact; Flashing Red and Green indicates reversed polarity (please correct immediately).
-
0V Activation Technology: Equipped with the XTAR signature 0V activation feature, which can safely recover and revive over-discharged lithium batteries.
-
Type-C Input & Wide Compatibility: Features a modern USB Type-C port. Supports charging via power adapters, laptops, or car chargers. Compatible with a wide range of battery sizes (see parameters for space limitations).
-
Comprehensive Safety Protections: Built-in overcurrent, overcharge, overvoltage, and short-circuit protections. The charger automatically stops charging when the battery is fully charged for peace of mind.
Product Parameters
-
Model: XTAR MC4S
-
Input Power: DC 5V 2.1A (Type-C)
-
Constant Charging Current: 1A x 2 / 0.5A x 4
-
Charging Cut-off Voltage: 4.20 ± 0.05V
-
Charging Cut-off Current: ≤70mA
-
Operating Temperature: 0 - 40°C
-
Dimensions: L100 x W97 x H26.5 mm
-
Net Weight: 95g
-
Supported Battery Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR), 1.2V Ni-MH / Ni-CD
-
Supported Sizes:
-
CH1 & CH4: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650.
-
CH2 & CH3: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700.
-
-
Important Restrictions:
-
The maximum physical space allows for two 26650 batteries in slots CH1 & CH4, plus two 21700 batteries (without protection boards) in slots CH2 & CH3.
-
This charger does NOT support protected 20700 and 21700 batteries.
-
Applications
-
Daily charging and maintenance of 18650/21700 Li-ion batteries used in EDC flashlights and tactical lights.
-
Reliable and safe power replenishment for 1.2V AA/AAA Ni-MH batteries in remote controls, wireless mice, and digital cameras.
-
A compact, portable charging solution for outdoor headlamps, camping lanterns, and survival gear.
-
Efficient charging for rechargeable batteries used in radio communication equipment and intercoms.
Frequently Asked Questions (FAQ)
Q1: What is included in the package?
A1: The package includes 1x XTAR MC4S Smart Charger, 1x USB-A to USB-C Charging Cable, and 1x User Manual. (Batteries are not included).
Q2: Can the MC4S charge protected 21700 batteries?
A2: No. Please note that the MC4S does NOT support protected 20700 and 21700 batteries. Slots CH2 and CH3 are physically limited to 21700 batteries without protection boards.
Q3: What does the flashing Red and Green LED lights mean?
A3: When the LED lights flash between red and green, it indicates the battery has been inserted with reversed polarity. Please immediately remove the battery and insert it in the correct orientation to begin charging.
Q4: What is the maximum charging current of the MC4S?
A4: The MC4S supports a maximum charging current of 1A for 2 slots simultaneously, or 0.5A for all 4 slots simultaneously, ensuring safe and balanced charging for different battery capacities.
Q5: Can I charge a Li-ion and a Ni-MH battery at the same time?
A5: Yes. The MC4S features 4 independent charging circuits. You can safely mix charge a 3.6V/3.7V Li-ion battery and a 1.2V Ni-MH battery in different slots simultaneously.
Shipping and Returns
-
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.
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
Finally a budget charger with USB-C. I can share cables with my laptop. The MC4S is compact, quiet, and safe. Highly recommend.
We have kids' toys using AA and my vape using 18650. This charger handles both simultaneously. The auto-detection is spot on.
I've been using this for 6 months straight. It's never overcharged a battery. My AA Eneloops and 18650s all come off at perfect voltage.
The plastic feels sturdy and the sliders move smoothly. I've charged everything from 16340 to 21700. The Type-C cable included is decent quality.
I keep this MC4S on my nightstand. It charges my 21700s at 1A and stays cool. The LEDs are bright but not blinding. Great value.
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:
-
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.