Description
Why This Bundle
High-drain batteries deserve a charger that can actually keep up with them. Overcharging, swelling, and no way to check cell health are the most common risks with mismatched charging setups. This bundle pairs genuine Samsung 25R Flat Top cells with the XTAR VC8S smart charger, so you get a matched, ready-to-use setup right out of the box — no guesswork on compatibility or safety.
This listing is for Flat Top. Looking for Button Top? Click here to buy: Samsung INR18650-25R Button Top + XTAR VC8S Bundle.
Samsung INR18650-25R (Flat Top) Specifications
| Item | Spec |
|---|---|
| Model | Samsung INR18650-25R (Flat Top) |
| Rated Capacity | 2500mAh |
| Nominal Voltage | 3.6V |
| Max Continuous Discharge | 20A |
| Charge Cutoff Voltage | 4.2V |
| Chemistry | NMC (Lithium Nickel Manganese Cobalt Oxide) |
| Cell Size | 18650 (approx. Φ18.3mm × 65.0mm) |
| Terminal Type | Flat Top — level positive terminal, suited for devices requiring full-surface contact |
| Typical Use | Battery packs, power banks, flashlights, power tools, e-bikes, and other devices designed for flat-top cells |
Note: High-drain cells demand careful handling — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.
The Charger: XTAR VC8S
- 8-bay Type-C LCD display with independent charging channels
- True Capacity Test (Grad.): charge–discharge–charge low-current analysis reveals the real capacity of each 25R cell, flagging degraded ones early
- Internal Resistance Test (IR): checks the health of every cell so you can pick out the best-performing ones for high-drain use
- Smart Recognition + Trickle-CC-CV: automatically applies the optimal charging curve for 25R cells
- PD Fast Charging: Type-C input, up to 3A on 2 bays with a 15V/3A power source
- Reverse-Polarity Protection + Over-Discharge Repair: dual safety features that extend battery lifespan
- 5 Adjustable Current Levels: 3A / 2A / 1A / 0.5A / 0.25A to match different charging needs
VC8S Charger – Supported Battery Types & Voltage
Compatible battery length: 30–80mm
3.6V/3.7V Li-ion/IMR/INR/ICR batteries: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 — including the Samsung 25R (18650) in this bundle (Charges batteries with or without a protection circuit board)
1.2V NiMH batteries: AAA, AA, A, SC, C (Note: Not compatible with 1.5V rechargeable lithium batteries)
Charge cutoff voltage: 4.20±0.05V (Li-ion) / 1.45±0.1V (NiMH)
Compatibility Notes
The VC8S uses a spring-loaded contact design, so Flat Top batteries seat securely without any adapter — the springs take up the extra length automatically. Samsung 25R Flat Top cells measure about 65.0mm, which sits comfortably within the VC8S's 30–80mm battery length range.
What's Included
- Samsung INR18650-25R Flat Top Battery × 8
- XTAR VC8S Charger × 1
- User Manual × 1
- USB-C to USB-C Charging Cable × 1
- USB-A to USB-C Charging Cable × 1
Safety Tips
- Store batteries in a proper case, keeping them away from loose metal objects to prevent short circuits
- Never disassemble, puncture, burn, or submerge the batteries
- Run a capacity test on the VC8S before first use to confirm each cell's condition
- These are high-drain cells intended for compatible, purpose-built devices — do not use them in unauthorized or modified equipment
- Flat Top batteries are commonly used in devices with spring or flat-contact battery holders (e.g., battery packs and power tools) — check your device's terminal requirements before use
FAQ
Q: Can the XTAR VC8S charge Samsung 25R Flat Top batteries safely? A: Yes. The VC8S automatically recognizes Li-ion chemistry and applies a Trickle-CC-CV charging profile matched to 25R cells, with a 4.2V cutoff voltage.
Q: What's the difference between Flat Top and Button Top batteries? A: The only difference is the shape of the positive terminal — Flat Top is level for full-surface contact, while Button Top has a raised nub. Capacity, voltage, and discharge rate are identical.
Q: Will Flat Top batteries sit properly in the VC8S charger slots? A: Yes. The VC8S's spring-loaded contacts are designed to accommodate both Flat Top and Button Top cells without any adapter or modification.
Q: How many 25R batteries can I charge on the VC8S at the same time? A: All 8 bays can charge simultaneously. For faster charging (3A or 2A), fewer bays are used at once — see the current level table in the VC8S charger listing for details.
Q: How do I know if a 25R battery is degraded? A: Run the VC8S's Capacity Test (Grad.) mode. It performs a charge–discharge–charge cycle and displays the battery's true remaining capacity, making it easy to spot cells that have aged or lost performance.
Q: Is 20A continuous discharge safe for everyday devices? A: These are high-drain cells built for devices that specifically call for high continuous discharge, such as certain power tools, flashlights, and DIY battery packs. Always check your device's battery requirements before use.
Q: What's in the box? A: 8 Samsung INR18650-25R Flat Top batteries, 1 XTAR VC8S charger, a user manual, a USB-C to USB-C cable, and a USB-A to USB-C cable.
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.