Samsung 35E 3500mAh 8A Button Top Battery 4-Pack with XTAR VC4SL Charger – High-Capacity Long-Run Power Kit for Flashlights & Outdoor Gear
Description
What's in This Bundle
- 4x Samsung INR18650-35E, 3,450mAh, Button Top
- 1x XTAR VC4SL 4-slot LCD USB-C charger
- 1x Type-C QC3.0 fast-charge cable, storage pouch, and manual (included with the charger)
A complete kit for anyone running a 4-cell device or building a small pack — four matched, genuine 35E cells paired with a charger that does more than just charge: it tests, monitors, and reports on each cell individually.
This listing is for Button Top. Looking for Flat Top? Click here to buy: Samsung 35E Flat Top + XTAR VC4SL 4 Bundle.
Why This Pairing Makes Sense
The 35E is Samsung's energy-focused 18650 — it trades discharge headroom for capacity, making 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. Four cells bought together as a matched set means consistent capacity and internal resistance across the group, which matters for anything running cells in series or parallel — mismatched cells degrade pack performance faster than any single "bad" cell would on its own. Button Top is the terminal type required by devices with spring-loaded battery contacts.
The XTAR VC4SL is a real step up from a basic charger: an LCD display showing live capacity, current, and internal resistance per slot, plus a capacity-test (grading) mode that charges, discharges, and recharges a cell to verify its actual capacity rather than just trusting the label. For a 4-cell purchase like this, that verification capability is genuinely useful — you can confirm all four cells are performing consistently before you commit them to a build.
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.
This listing is for Button Top. For Flat Top click here
XTAR VC4SL — Charger Specs
| Parameter | Value |
|---|---|
| Input | Type-C, QC3.0 (9V⎓2A) |
| Charging Current (CC) | 3A×1 / 2A×2 / 1A×4 / 0.5A×4 / 0.25A×4 — steps down automatically as more slots are occupied, or can be manually adjusted within what the slot count allows |
| Charging Method | 3-stage charging (trickle → constant current → constant voltage), 4 independently monitored slots, dynamic power allocation based on input power available |
| Cut-off Voltage | 4.2V ±0.05V (Li-ion) / 1.45V ±0.1V (Ni-MH/Ni-Cd) |
| Cut-off Current | ≤120mA |
| Operating Temperature | 0°C to 40°C |
| Dimensions | L156mm x W115mm x H35mm |
| Net Weight | 212g |
| Display | Color LCD — press Mode to cycle between capacity, current, and internal resistance readouts per slot in real time |
| Special Modes | Capacity/grading mode (charge → discharge → recharge cycle to verify true capacity), storage mode (charges or discharges cells to their rated storage voltage to extend battery life), standard charge mode |
| Compatible Cell Sizes | 3.6V/3.7V Li-ion: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, flat-top 32650. |
| 1.2V Ni-MH/Ni-Cd: AAA, AA, A, SC, C. Supports protected 20700/21700 cells; spring-loaded slots can also fit two 32650s and two 18650s at once | |
| Safety | Reverse polarity protection (displays "Err," shows 0V, and stops automatically), auto cut-off when fully charged, multiple charge protections |
A realistic note on charge time: the 35E's own max charge current is 2A, well above the VC4SL's 1A-per-slot rate with all four bays occupied — you've got real margin here, not a cell being pushed to its limit. With the included QC3.0 adapter/cable active, expect a full charge in roughly 4-4.5 hours for all four cells at once.
Why the Capacity Test Mode Matters for a 4-Pack
Buying four cells at once is exactly the scenario where verifying consistency pays off. The VC4SL's grading mode runs each cell through a charge-discharge-recharge cycle and reports its actual measured capacity — so instead of just trusting that all four cells hit their rated ~3,350mAh+, you can check for yourself before building them into a series or parallel pack. Cells with a wider gap during testing are worth flagging rather than mixing into a tight pack build.
Where This Bundle Actually Fits
- Power banks and backup power builds — steady, moderate draw is exactly what this cell is built for
- 4-cell UPS and emergency backup packs — capacity matters more than burst current in this use case
- Low-to-moderate output flashlights and headlamps run as a matched set of four
- DIY packs (2S2P, 4S, etc.) where matched internal resistance across all four cells genuinely matters
Not the right fit for sub-ohm 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 — that's exactly what the grading mode is for, if you want to check compatibility before combining batches.
- 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.
- For full charging speed, use the included QC3.0 adapter/cable — the VC4SL negotiates higher power with QC3.0 sources specifically.
Frequently Asked Questions
Can this charger really tell me if a cell is underperforming? Yes — the grading/capacity test mode charges, discharges, and recharges a cell while measuring the actual capacity delivered, rather than relying on the printed rating. It's a genuine diagnostic tool, not just a charge indicator.
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).
Do I need to charge all four cells at once? No — each of the four slots operates independently, so you can charge one, two, three, or four cells at a time, and mix different cell sizes or even NiMH batteries across the slots if needed.
What's the difference between storage mode and grading mode? Storage mode charges or discharges a cell to its rated storage voltage to help preserve battery life during long-term storage. Grading mode runs a full charge-discharge-recharge cycle specifically to measure the cell's actual capacity.
What happens if I insert a cell backwards? The display shows "Err" for that slot and the voltage reading drops to 0 — the charger stops working on that slot automatically rather than attempting to charge. Remove the cell, check its orientation, and reinsert.
In stock now. This bundle ships as a matched set of four genuine Samsung 35E Button Top cells with a verified XTAR VC4SL charger — ready for power banks, backup packs, and other moderate-drain builds out of the box.
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.
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Four 35E 8A 3500mAh cells and VC4SL charger. Perfect for extended camping.
Samsung 35E are consistent 8A 3500mAh. XTAR VC4SL is a solid smart charger.
Four high-capacity button tops and a smart charger. My camping trips are fully powered.
Always have charged 3500mAh cells. VC4SL display is very informative.
Four Samsung 35E and XTAR VC4SL. Safe, long lasting, and informative.
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.