EVE INR18650-33V 3300mAh 10A Flat Top Battery 4-Pack with XTAR VC4SL Charger – High-Capacity Power Bundle for EDC Flashlights, Camping Gear & Portable Devices
Description
What's in This Bundle
- 4x EVE INR18650-33V, 3,200mAh, Flat 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 mid-capacity cells paired with a charger that does more than just charge: it tests, monitors, and reports on each cell individually.
This listing is for Flat Top. Looking for Button Top? Click here to buy: EVE INR18650-33V Button Top + XTAR VC4SL 4 Bundle.
Why This Pairing Makes Sense
The 33V is EVE's NCM (nickel-cobalt-manganese) mid-capacity 18650, built for applications needing a solid balance of runtime and discharge capability — e-bikes, portable power tools, AGVs, and general battery pack builds. It carries a genuine 10A continuous discharge rating alongside its 3,200mAh capacity. 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. 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 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. Given the naming confusion noted above between the 33V and 33VA, that verification capability is a genuinely useful way to confirm you actually have the 3,200mAh cell you ordered.
EVE INR18650-33V — Battery Specs
| Parameter | Value |
|---|---|
| Brand & Model | EVE Energy INR18650-33V |
| Chemistry | NCM (nickel-cobalt-manganese) |
| Capacity | 3,200mAh nominal (3,100mAh minimum) |
| Nominal Voltage | 3.6V |
| Max Charge Voltage | 4.2V |
| Standard Charge | CC-CV, 0.5C (~1.6A), 0.02C cutoff |
| Discharge Cutoff Voltage | 2.5V |
| Max Continuous Discharge | 10A (3C) |
| AC Internal Resistance | ≤30mΩ |
| Charge Temperature | 0°C to 55°C |
| Discharge Temperature | -20°C to 70°C (cell surface) |
| Cycle Life | ~800-1,000 cycles to 70% capacity (varies by source/test conditions) |
| Terminal Type | Flat Top |
| Protection Circuit | None (unprotected cell) |
| Weight | 48g max |
| Cell Dimensions | Diameter ~18.35mm, Height 65mm |
These are genuine cells verified against EVE's official datasheet, not rewrapped or relabeled stock — and specifically the 3,200mAh 33V, not the related 3,300mAh 33VA.
This listing is for Flat Top. For Button 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 33V's own standard charge current is roughly 1.6A (0.5C), somewhat above the VC4SL's 1A-per-slot rate with all four bays occupied — expect a full charge in roughly 3.5-4 hours for all four cells at once, a safe and conservative rate relative to the cell's spec.
Why the Capacity Test Mode Matters for a 4-Pack
Given the naming overlap between the 33V and the higher-capacity 33VA, buying four cells and being able to actually verify their real measured capacity is a genuinely useful check — not just a nice-to-have. The VC4SL's grading mode runs each cell through a charge-discharge-recharge cycle and reports the actual result, so you can confirm you received the 3,200mAh cell you ordered and that all four are performing consistently before building them into a pack.
Where the 33V Actually Fits
- E-bike and e-scooter packs — one of EVE's core application areas for this cell
- AGVs, portable vacuums, and balance boards — moderate-drain equipment needing solid runtime
- Power tool packs in parallel/series configurations
- 4S, 2S2P, or similar DIY pack builds where 10A per cell is sufficient
Not the right choice for sub-ohm mechanical mods, or anything regularly demanding more than 10A per cell — for those, a dedicated high-drain cell like the Samsung 25R or 30Q is a better match.
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 cells with older ones you already own, even if they're also labeled 33V. Confirm you're not mixing a 33V with a 33VA, since they're different capacity ratings despite the similar name.
- 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.
- 10A is a real ceiling. Don't use these in devices that regularly demand more current than that.
Frequently Asked Questions
Is this the 3,200mAh or 3,300mAh version? This listing is the EVE 33V, rated at 3,200mAh nominal (3,100mAh minimum) per EVE's official datasheet. The 3,300mAh cell is a related but distinct SKU marketed as the "33VA" — if you need that specific capacity, confirm with us before ordering.
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. Given the naming overlap with the 33VA, that's a genuinely useful way to confirm what you actually have.
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.
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 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.
In stock now. This bundle ships as a matched set of four genuine EVE INR18650-33V Flat Top cells with a verified XTAR VC4SL charger — ready for e-bike packs, power tools, and general electronics 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.
Payment & Security
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Security
Four EVE 3300mAh and VC4SL. Perfect for high-lumen EDC flashlights.
Storage, grading, independent slots. EVE flat tops are genuine and matched.
My fan and Bluetooth speaker use flat tops. EVE 33V 3300mAh 10A is a perfect balance.
EVE 3300mAh flat tops hold voltage well. VC4SL is safe and reliable.
Solid 3300mAh 10A cells. VC4SL is a great charger to pair with them.
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.