XTAR VC8 8-Bay Smart Charger with 21700 4900mAh 10A Battery Bundle | 3A Fast Charge & Capacity Grading Kit for Drones
Description
Product Description
This bundle combines the flagship XTAR VC8 8-slot professional-grade smart charger with high-capacity XTAR 21700 4900mAh 10A lithium-ion rechargeable batteries. (Available in 1-Pack or 2-Pack options). The included 21700 battery delivers an impressive 4900mAh true capacity, a 3.6V nominal voltage, and a robust 10A maximum continuous discharge current, making it an ideal powerhouse for high-drain consumer electronics. The XTAR VC8 charger offers eight independent charging circuits, dual high-definition VA LCD screens, and a powerful 3A fast charging mode. It goes far beyond basic charging with professional features: Capacity Grading to measure true mAh, Internal Resistance testing, and an intelligent Storage mode that automatically maintains the optimal 3.7V long-term voltage. This kit provides the ultimate professional power management and health diagnostic solution for enthusiasts and professionals.
Key Features
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Complete High-Capacity Power Kit: Includes one XTAR VC8 8-slot smart charger (with USB cable) and one or two XTAR 21700 4900mAh 10A batteries based on your selection.
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High-Capacity Battery Specifications: Features 4900mAh true capacity, a 3.6V nominal voltage, a 4.2V charging cut-off, and a 10A max continuous discharge current. The battery weighs 71g and measures 21.4mm in diameter and 74.8mm in height.
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8 Fully Independent Charging Slots: Each slot features independent circuit control, allowing you to charge various battery types (Li-ion and Ni-MH) without mutual interference. Designed with extended slots to safely accommodate protected 21700 batteries.
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3A Ultra-Fast Charging: Equipped with a QC3.0 Type-C input, providing a maximum 3A charging current when a single battery is placed in slot CH1 or CH8, drastically reducing downtime.
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Dual VA LCD Screens & Advanced Diagnostics: High-contrast dual screens display real-time voltage, current, capacity (mAh), and internal resistance. The Capacity Grading mode (supported in CH1-CH4) runs a full charge-discharge-charge cycle to reveal true battery health.
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Intelligent Storage Mode & 0V Activation: Automatically charges or discharges batteries to the optimal long-term storage voltage of 3.7V for Li-ion batteries to prevent capacity loss. The 0V activation feature safely revives over-discharged batteries.
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Adjustable Charging Currents: Offers four manual current gears: 250mA, 500mA (8 slots), 1000mA (4 slots), and 2000mA (Slots CH1/CH8).
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Comprehensive Safety Protections: Built-in over-voltage, over-current, short-circuit, reverse polarity, and over-charge protection, paired with an intelligent temperature control system.
Product Parameters
Charger (XTAR VC8):
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Model: XTAR VC8
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Input Power: QC3.0 Type-C (5V⎓2A / 9V⎓2A)
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Adjustable Charging Current: 3A x 1 / 2A x 2 / 1A x 4 / 0.5A x 8 / 0.25A x 8
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Charging Cut-off Voltage: 4.20 ± 0.05V (Li-ion) / 1.45 ± 0.1V (Ni-MH)
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Charging Cut-off Current: ≤120mA
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Operating Temperature: 0 - 40°C
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Dimensions: L194mm x W134mm x H34mm
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Net Weight: 350g
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Supported Li-ion Sizes: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 (Supports protected 20700 & 21700)
Battery (XTAR 21700 4900mAh):
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Brand: XTAR
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Model: 21700 Rechargeable Li-ion Battery
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Nominal Capacity: 4900mAh
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Nominal Voltage: 3.6V
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Charging Cut-off Voltage: 4.2V
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Max Continuous Discharge Current: 10A
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Weight: 71g
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Dimensions: 21.4 ± 0.3mm (Diameter) x 74.8 ± 0.5mm (Height)
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Note: Manual measurement has an error margin of 0.5mm.
Applications
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Professional battery capacity grading and long-term storage management.
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High-efficiency multi-slot charging for 21700 cells used in high-lumen EDC tactical flashlights and searchlights.
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Advanced battery diagnostics for RC drone batteries, including IR testing and accurate capacity sorting.
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Battery screening, pairing, and maintenance for DIY power bank builders and custom battery pack assemblers.
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Reliable power management for outdoor survival gear and emergency backup systems.
Frequently Asked Questions (FAQ)
Q1: What is included in this bundle?
A1: The bundle includes one XTAR VC8 8-slot smart charger, one USB-A to USB-C charging cable, one user manual, and either 1 or 2 units of the XTAR 21700 4900mAh 10A batteries based on your selected variant.
Q2: Can the VC8 accommodate protected 21700 batteries?
A2: Yes. The XTAR VC8 features wide, extended slots that are specifically designed to safely and securely accommodate protected 20700 and 21700 batteries, including the 21.4mm diameter and 74.8mm height of this model.
Q3: How do I achieve the maximum 3A fast charging speed with the VC8?
A3: To achieve 3A fast charging, you must use a QC3.0 (9V/2A) power adapter and charge a single battery exclusively in slot CH1 or CH8. The charger will automatically detect the input and adjust the current accordingly.
Q4: How does the "Capacity Grading" mode work for this 21700 battery?
A4: Capacity Grading mode (supported in CH1 to CH4) runs a complete charge-discharge-charge cycle. This accurately measures the true capacity of the 4900mAh cell, allowing you to easily identify if the battery is genuine, healthy, or has aged.
Q5: What is the purpose of the "Storage Mode" for Li-ion batteries?
A5: If you do not plan to use this 3.6V 21700 battery for an extended period, the Storage Mode will automatically charge or discharge it to the optimal long-term storage voltage of 3.7V. This significantly slows down capacity degradation and maximizes the battery's overall lifespan.
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
The VC8 is a powerhouse, and these 4900mAh cells perform flawlessly. The capacity grading ensures consistency.
My intercom runs days on a single 4900mAh cell. The VC8 tests their health, so I know when to replace.
I use these 21700s in my ground station. The VC8 charges them fast between flights and grades them monthly.
My mod pulls 8A, these 10A cells handle it. The VC8 grades them so I always have matched sets.
This bundle is a fantastic value. The 21700 4900mAh cells have low IR and true capacity, verified by the VC8.
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.