NITECORE UMS4 4-Bay Smart Battery Charger | USB-C QC 3000mA Fast Charge with LCD Health Monitor for 3.6V/3.7V Li-ion, 3.2V LiFePO4 & 1.2V Ni-MH Batteries
Description
Product Description
The NITECORE UMS4 is a premium 4-slot intelligent battery charger designed for enthusiasts and professionals managing multiple batteries. It features a USB-C input supporting QC 2.0 fast charging (up to 18W) and delivers a powerful 3000mA maximum output for a single slot. The high-definition LCD screen provides comprehensive real-time data, including charging current, voltage, and internal resistance, enabling accurate battery health assessment (Good/Poor). With adjustable charging voltages (4.35V, 4.2V, 3.7V, 1.48V), it supports a wide range of chemistries, including standard 3.6V/3.7V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH/Ni-CD. Built-in IMR repair, over-discharge activation, and PC flame-retardant materials ensure safety and longevity.
Key Features
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3000mA Fast Charge & QC 2.0 Support: Single slot max 3000mA output. Supports 5V/2A, 9V/2A, 12V/1.5A QC 2.0 input (18W max).
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Real-time LCD Monitoring & IR Health Test: HD LCD displays voltage, current, charged capacity, and internal resistance. Automatically grades battery health as "Good" or "Poor".
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Adjustable Multi-Voltage & Multi-Chemistry Support: Selectable output voltages (4.35V, 4.2V, 3.7V, 1.48V) for 3.6V/3.7V Li-ion, 3.2V LiFePO4, IMR, and 1.2V Ni-MH/Ni-CD batteries.
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IMR Battery Repair & Activation: Displays "EEEE" for over-discharged IMR cells; long-press "V" to repair. Automatically activates over-discharged protected Li-ion batteries.
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4 Independent Slots: Supports simultaneous mixed charging of different battery types and sizes, with independent circuits.
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Advanced Safety & Cooling: PC flame-retardant material, unique cooling fins, intelligent temperature control, over-charge timeout protection, reverse polarity and short-circuit protection (flashing "EE").
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Energy-Saving Mode: LCD screen automatically dims after 3 minutes of inactivity.
Product Parameters
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Brand: NITECORE
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Model: UMS4
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Input Voltage: DC 5V/2A, 9V/2A, 12V/1.5A (Max 18W, USB-C)
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Output Voltage: 4.35V ±1%, 4.2V ±1%, 3.7V ±1%, 1.48V ±1%
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Output Current: 3000mA1 (Max), 2000mA2 (Max), 1000mA*4 (Max)
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Dimensions: 159 x 107 x 41 mm
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Net Weight: 255.4g (excluding cable)
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Supported Battery Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR), 3.2V / 3.3V LiFePO4, 1.2V Ni-MH / Ni-CD
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Supported Li-ion/IMR/LiFePO4 Sizes: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
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Supported Ni-MH/Ni-CD Sizes: AA, AAA, AAAA, C, D
Applications
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Professional maintenance and health diagnosis for high-end EDC tactical flashlights.
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Simultaneous mixed-charging station for managing multiple household electronics batteries (Li-ion, LiFePO4 & Ni-MH).
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Customizable charging for LiFePO4 batteries in DIY power stations and solar projects.
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Outdoor power hub for camping gear, utilizing solar panel or mobile power USB-C input.
Frequently Asked Questions (FAQ)
Q1: Does the UMS4 support 21700 batteries?
A1: Yes, the UMS4 is fully compatible with 21700 batteries, as well as larger cells like 26650 and 26700.
Q2: How does the battery health monitoring function work?
A2: Once a battery is inserted, the charger automatically performs an internal resistance test. The screen will display the resistance value in mΩ and indicate the health status as "Good" (resistance < 250mΩ) or "Poor" (resistance > 250mΩ), helping you identify aged or degraded cells.
Q3: What is the IMR battery repair function?
A3: If you insert an over-discharged IMR battery, the screen will display "EEEE" to indicate it needs repair. You can long-press the "V" button to enter repair mode, and once complete, it will automatically switch to the normal charging mode.
Q4: Can I charge LiFePO4 batteries with the UMS4?
A4: Yes, the UMS4 fully supports 3.2V/3.3V LiFePO4 batteries. It offers adjustable charging voltages, allowing you to select the appropriate profile based on the specific cell requirements.
Q5: What do the flashing "EE" error messages indicate?
A5: The flashing "EE" on the display indicates a reverse polarity connection or a short circuit. Please immediately remove the battery, check for correct polarity, and reinsert it properly to resume safe charging.
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
My UMS4 has been running almost continuously for three years. Still accurate and reliable.
If you're serious about batteries, the UMS4 is the best investment. It's a charger and analyzer in one.
I keep a spreadsheet of all my cells' IR and capacity measured by the UMS4. It's an invaluable tool.
The UMS4 combines speed, safety, and analysis. No other 4-bay charger offers this feature set.
With a QC adapter, four 18650s charge simultaneously at high speed. The thermal management works well.
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.