Samsung 35E 18650 Button Top 2-Pack with XTAR MC2 Charger – 3500mAh 8A Long-Lasting Battery Kit for Camping & Headlamps
Description
What's in This Bundle
- 2x Samsung INR18650-35E, 3,450mAh, Button Top
- 1x XTAR MC2 dual-slot USB-C charger
- 1x USB-C charging cable (included with the charger)
A ready-to-go starter kit for anyone who needs two matched, genuine high-capacity 18650 cells and a compact way to charge them — no separate charger purchase, no guessing whether a charger you already own is a safe, appropriate match.
This listing is for Button Top. Looking for Button Top? Click here to buy: Samsung 35E Flat Top + XTAR MC2 Bundle.
Why This Pairing Makes Sense
The 35E is Samsung's energy-focused 18650 — it trades discharge headroom for capacity, which makes it a better fit for devices that draw moderate, steady current rather than sharp bursts: power banks, UPS backups, low-drain flashlights, and similar gear. Button Top is the terminal type required by devices with spring-loaded battery contacts, which covers a lot of that same equipment category. Buying two cells together as a matched pair means you're starting with cells from a similar batch, which matters for anything that runs cells in series or expects consistent performance between them.
We chose the MC2 for this bundle not just for its steady 1A charge, but also for its 0V activation technology — it can safely revive over-discharged 35E cells that other chargers would simply reject. This one feature alone can save you from throwing away a perfectly good battery.
The XTAR MC2 pairs well here because it charges both slots at a full 1A simultaneously, with no current-splitting trade-off for using both bays at once. It's genuinely portable without asking you to sacrifice charge speed for that size — a sensible match for a cell like the 35E where the charging current is comfortably within what the cell is rated to handle.
Samsung 35E — Battery Specs
| Parameter | Value |
|---|---|
| Brand & Model | Samsung SDI INR18650-35E |
| Capacity | 3,450mAh nominal (Samsung's own minimum spec: ≥3,350mAh standard discharge) |
| Nominal Voltage | 3.6V |
| Full Charge Voltage | 4.2V |
| Discharge Cutoff Voltage | 2.65V |
| Max Continuous Discharge | 8A |
| Max Charge Current | 2A (2,000mA) — standard charge is 1,700mA |
| Internal Impedance | ≤35mΩ (AC, 1kHz, initial) |
| Terminal Type | Button Top |
| Protection Circuit | None (unprotected cell) |
| Weight | ~48-50g per cell |
This is an energy-density cell, not a high-drain one — its 8A continuous rating is meaningfully lower than cells like the 30Q or 25R. That's the trade-off for the extra capacity, and it's the right call if your device doesn't need to pull hard current. These are genuine cells verified against Samsung's official datasheet, not rewrapped or relabeled stock.
XTAR MC2 — Charger Specs
| Parameter | Value |
|---|---|
| Input | Type-C, 5V⎓2A |
| Charging Current | 1A per slot — both slots simultaneously, no splitting |
| Charging Method | 3-stage charging (trickle → constant current → constant voltage), 2 independent slots with automatic detection |
| End-of-Charge Voltage | 4.2V ±0.05V |
| End-of-Charge Current | <130mA cutoff |
| Operating Temperature | 0°C to 40°C |
| Dimensions | L103mm x W53mm x H30mm |
| Weight | 54g |
| Compatible Cell Sizes | 3.6V/3.7V Li-ion, sizes 10440 through 26650 (10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650), including protected 21700 cells |
| Extra Feature | "0V" activation technology — can recover some over-discharged cells |
| Status Indicators | Green = standby/fully charged, Red = charging, Off/unlit = reverse polarity or abnormal insertion |
| Safety | Reverse polarity protection, short-circuit protection, 3-stage charge control |
A realistic note on charge time: at 1A per slot, a 35E charges from empty to full in roughly 4-4.5 hours — slightly longer than a lower-capacity cell like the 30Q simply because there's more capacity to fill, not because the charging is any less efficient. The MC2's 1A rate is comfortably within the 35E's 2A max charge spec, so there's margin there, not a cell being pushed to its limit.
This listing is for Button Top . For Flat Top, click here
Where the 35E Actually Fits
- Power banks and backup power builds — steady, moderate draw is exactly what this cell is built for
- UPS and emergency backup packs — capacity matters more than burst current in this use case
- Low-to-moderate output flashlights and headlamps — long runtime over extreme brightness
- General-purpose electronics that don't pull more than 8A per cell
Not the right fit for sub-ohm mods, high-output flashlights on turbo, or power tools — those applications need more discharge headroom than the 35E is rated for. If that's your use case, look at the 30Q or 25R instead.
Things Worth Knowing Before You Use This Kit
- The 35E 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 cells with older ones you already own, even if they're also 35E. Pairing cells from different ages or usage histories in a series/parallel setup can cause imbalanced charging over time.
- Don't put these in a high-drain device expecting 30Q or 25R-level current. The 35E's 8A ceiling is a real limit, not a conservative underrating — pushing past it will cause excess heat and accelerated wear.
Frequently Asked Questions
Can this charger handle the 35E's full capacity safely? Yes. The MC2 charges at a full 1A per slot, which is well within the 35E's 2A max charge rating — a full charge takes roughly 4-4.5 hours, both cells at once.
Why is the 35E's discharge rating so much lower than other Samsung 18650 cells? It's a design trade-off, not a flaw. Samsung built the 35E to prioritize capacity over current delivery, which is why it holds more energy (3,450mAh) than cells like the 30Q (3,000mAh) or 25R (2,500mAh) but delivers less continuous current (8A vs. 15A or 20A).
Can I charge two different battery sizes at once? Yes — the MC2's two slots operate independently with automatic size and chemistry detection, so you could charge one 18650 and a differently-sized cell (like a 21700) at the same time if needed. This bundle is set up for two 35Es.
Is this kit protected-cell compatible? The MC2 supports protected 21700 cells if you use it for those later. The Samsung 35E cells included in this bundle are unprotected bare cells, which is standard for this model.
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 pair of genuine Samsung 35E Button Top cells with a verified XTAR MC2 charger — ready for power banks, backup packs, and other moderate-drain builds out of the box.
Authentic Samsung Cells – sourced from official distributors. No rewraps, no fakes.
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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
Two 35E 8A 3500mAh cells and MC2 USB. Perfect for weekend camping trips.
Samsung 35E are consistent 8A 3500mAh. XTAR MC2 is a solid USB charger.
Samsung 35E 3500mAh is the best for runtime. MC2 is simple and safe USB charger.
Date codes are recent. MC2 USB charger works perfectly from my power bank.
Two Samsung 35E and XTAR MC2 USB. Safe, long lasting, and 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:
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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.