Samsung 20R (V4) 2000mAh 20A Flat Top Battery 4-Pack with XTAR MC4S Charger – High-Drain Power Bundle for EDC Flashlights, Drones & Custom Power Packs
Description
What's in This Bundle
- 4x Samsung INR18650-20R4, 2,000mAh (max), Flat Top
- 1x XTAR MC4S 4-slot Type-C charger
- 1x USB-A to USB-C charging cable and user manual (included with the charger)
A complete kit for anyone running a 4-cell high-drain device — four matched cells paired with a compact, no-frills 4-bay charger that also handles Ni-MH/Ni-Cd batteries if you need that flexibility.
A note on "20R4": this is a distinct cell revision, not simply a batch label for the standard INR18650-20R. Based on the lab-test data available for this specific cell, it differs from the standard 20R in a couple of measurable ways — most notably a 20A max continuous discharge rating (versus 22A on the standard 20R) and a tighter internal resistance spec. We've sourced these numbers from supplier lab testing rather than a publicly available Samsung SDI datasheet, since we haven't located one specific to this revision. If you have a manufacturer spec sheet that differs from what's below, let us know before ordering.
This listing is for Flat Top. Looking for Button Top? Click here to buy: Samsung 20R4 Button Top + XTAR MC4S Bundle.
Why This Pairing Makes Sense
Like the standard 20R, this is a lower-capacity, high-current cell suited to power tool packs, e-bike builds, and other applications where sustained current draw matters more than runtime per cell. Buying four cells together as a matched set means consistent capacity and internal resistance across the group — this matters more, not less, for a high-drain cell, since mismatched cells show up faster under heavy load. Flat Top is the standard terminal type for most current devices — DIY packs, tool battery builds, and equipment that doesn't rely on spring-loaded contacts.
The XTAR MC4S is a straightforward 4-bay charger with a Type-C input (an upgrade over the older Micro-USB MC4), intelligent charging-strategy selection based on battery chemistry, and enough flexibility to also charge AA/AAA Ni-MH or Ni-Cd cells if you need a second use for it beyond 18650s.
Samsung INR18650-20R4 — Battery Specs
| Parameter | Value |
|---|---|
| Brand & Model | Samsung INR18650-20R4 |
| Max Capacity | 2,000mAh |
| Min Capacity | 1,900mAh |
| Rated Voltage | 3.6V |
| Max Charge | 4A / 4.2V |
| Max Discharge | 20A / 2.5V cutoff |
| Internal Resistance | 14mΩ ±3 (lab-tested) |
| Net Weight | ~44g |
| Cell Dimensions | Height 65mm, Diameter 18mm |
| Terminal Type | Flat Top |
| Protection Circuit | None (unprotected cell) |
How this compares to the standard Samsung 20R: capacity is essentially the same (2,000mAh), and the max charge current matches (4A). The two measurable differences are discharge rating (20A here versus 22A on the standard 20R) and internal resistance, where this batch's lab-tested figure (14mΩ) runs lower than what's typically measured on standard 20R cells.
This listing is for Flat Top. For Button Top, click here
XTAR MC4S — Charger Specs
| Parameter | Value |
|---|---|
| Input | Type-C, DC 5V⎓2.1A |
| Charging Current | 1A×2 (CH1 & CH4) or 0.5A×4 (all slots occupied) |
| Charging Method | TC-CC-CV 3-stage charging (trickle → constant current → constant voltage), automatic strategy selection by battery chemistry |
| Charge Cut-off Voltage | 4.20V ±0.05V |
| Charge Cut-off Current | ≤70mA |
| Operating Temperature | 0°C to 40°C |
| Dimensions | L100mm x W97mm x H26.5mm |
| Net Weight | 95g |
| Compatible Cell Sizes | 3.6V/3.7V Li-ion/IMR/INR/ICR: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 (CH1 & CH4 support the full range including 26650; CH2 & CH3 support up to 21700 only). 1.2V Ni-MH/Ni-Cd: AAAA, AAA, AA, A, SC, C |
| Notes | Can fit two 26650 cells (CH1 & CH4) plus two unprotected 21700 cells (CH2 & CH3) at once; cannot charge protected 20700/21700 cells |
| NiMH/NiCd Detection | Precise full-charge detection via 0ΔV and -ΔV monitoring, high-precision MCU |
| Extra Feature | 0V activation — can recover some over-discharged cells |
| Status Indicators | Red = charging/activating/slot short-circuit; Green = fully charged, no battery inserted, or poor contact; Blinking red+green = reverse polarity (reinsert cell correctly) |
| Safety | Overcurrent, over-voltage, and short-circuit protection |
A realistic note on charge time: with all four bays occupied, the MC4S delivers 0.5A per slot — a full charge for all four 20R4 cells takes roughly 4.5-5 hours. If you only use the outer two slots (CH1 & CH4), you can get 1A per cell instead, cutting that time roughly in half.
Where This Cell Fits
- Power tool battery packs — cordless drills, saws, and similar tools that draw hard and often
- E-bike and e-scooter packs — commonly used in multi-cell parallel configurations
- DIY packs prioritizing current over runtime, especially builds where consistent internal resistance across cells matters for pack balance
Not the right choice if you want strong runtime from a small number of cells, or if you need the slightly higher 22A ceiling of the standard 20R for a specific application.
Things Worth Knowing Before You Use This Kit
- This is an unprotected cell. The charger enforces its own voltage and current cutoffs, but your device still needs to handle discharge-side protection.
- Don't mix these with standard 20R cells or older 20R4 batches in the same pack. Even with similar specs, small differences in internal resistance or capacity between cells can cause imbalanced charging over time.
- Flat Top won't work in devices that specifically require Button Top cells — check your device's battery compartment before ordering if you're not sure which terminal type it needs.
- CH2 and CH3 don't support 22650/25500/26650 or protected 20700/21700 cells — for larger cell sizes, use the outer CH1/CH4 slots.
- This is a lower-capacity cell by design, whether standard 20R or 20R4 — don't expect 25R or 30Q-level runtime from it.
Frequently Asked Questions
What's actually different between this and the standard Samsung 20R? Based on the lab data we have for this batch, capacity and max charge current are essentially the same. The measurable differences are a slightly lower max continuous discharge rating (20A vs. 22A) and a tighter, lower internal resistance spec (14mΩ vs. the standard 20R's typical range).
How is the MC4S different from the older MC4? Mainly the input connector — the MC4S uses Type-C instead of the older MC4's Micro-USB, plus a slightly tighter charge cutoff current (≤70mA vs. ≤120mA). Charging current profile and overall dimensions are essentially the same between the two.
Will Flat Top cells work in my device? If your device uses spring-loaded, flat, or magnetic-style contacts without a raised positive terminal requirement, Flat Top is the correct choice. If your device specifically calls for Button Top (a raised positive terminal), you'll want that version instead.
Does this charger work with rechargeable AA/AAA batteries too? Yes — the MC4S automatically detects Ni-MH/Ni-Cd chemistry and applies a dedicated charging strategy with precise full-charge detection, separate from its Li-ion charging profile.
Is this kit protected-cell compatible? No — the MC4S cannot charge protected 20700/21700 cells. The cells included in this bundle are unprotected bare cells, which is standard for this model and compatible with the charger.
What does the "0V activation" feature do? It lets the charger attempt a slow, controlled charge on cells drained deep enough that a standard charger would refuse to recognize them at all. It won't save every over-discharged cell, but it can recover some that would otherwise be written off.
In stock now. This bundle ships as a matched set of four Samsung INR18650-20R4 Flat Top cells with a genuine XTAR MC4S charger — a compact, Type-C-equipped way to charge a full set of high-drain cells.
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
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Security
If you rely on 18650 power for your drone equipment, this Samsung 20R flat top 4-pack with MC4S provides professional-grade high-drain power.
If you want genuine 20A 18650 flat tops with a quality 4-bay charger, this Samsung 20R 4-pack with MC4S is the ultimate high-drain power setup.
The charger uses intuitive LED indicators. Simple red and green lights make it easy to see charging status at a glance.
The 20R cells stay cool even under heavy load in my hot-rod flashlights. The MC4S charger manages temperature efficiently.
My RC truck runs on packs built with these 20R flat tops. The 20A discharge provides the power needed for competitive racing.
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.