LG INR18650-MJ1 3500mAh Flat Top Li-ion Battery 2-Pack with XTAR MC2 USB Charger – High-Performance Power Bundle for EDC Flashlights, Outdoor Gear & Camping
Description
What's in This Bundle
- 2x LG INR18650-MJ1, 3,500mAh, Flat 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.
Flat Top is the MJ1's native factory configuration — this is the standard, unprotected form LG Chem manufactures the cell in.
This listing is for Flat Top. Looking for Button Top? Click here to buy: LG INR18650-MJ1 Button Top + XTAR MC2 Bundle.
Why This Pairing Makes Sense
The MJ1 was, at release, one of the highest-capacity 18650 cells on the market — LG's NMC811 chemistry with a silicon-graphite anode pushes energy density further than most cells in this size while still holding a genuine 10A continuous discharge rating. That combination makes it a strong fit for high-capacity flashlights, e-bike packs, and general electronics where runtime matters but you still want more current headroom than a pure energy cell like the NCR18650B provides. Flat Top is the standard terminal type for most current devices — DIY packs, work lights, and equipment that doesn't rely on spring-loaded contacts. Buying two cells together as a matched pair means you're starting with cells from a similar batch — which matters more than usual here, since independent testing has shown some batch-to-batch capacity variability with this cell.
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.
LG INR18650-MJ1 — Battery Specs
| Parameter | Value |
|---|---|
| Brand & Model | LG Chem INR18650-MJ1 |
| Chemistry | NMC811 cathode, graphite-silicon anode |
| Capacity | 3,500mAh nominal (3,350mAh minimum) |
| Nominal Voltage | 3.635V average |
| Standard Charge | 0.5C (1.675A) CC, 4.2V CV, 50mA cutoff |
| Max Charge Voltage | 4.2V ±0.05V |
| Max Charge Current | 1.0C (~3.35A) |
| Standard Discharge | 0.2C (670mA), 2.5V cutoff |
| Max Continuous Discharge | 10A |
| Cycle Life | 400 cycles (charge 1.5A / discharge 4A) to 80% capacity |
| Charge Temperature | 0°C to 45°C |
| Terminal Type | Flat Top (native factory configuration) |
| Protection Circuit | None (unprotected cell) |
| Weight | ~49g max |
| Cell Dimensions | Diameter 18.4mm (max 18.5mm), Height 65.0mm (max 65.2mm) |
A note on real-world capacity: independent lab testing has shown this cell's actual measured capacity can run somewhat below its 3,500mAh nominal rating in some batches — one third-party comparison test measured roughly 3,205-3,384mAh depending on discharge rate, noticeably below the datasheet figure. This isn't unique to the MJ1, but it's a genuine reason to prioritize matched-batch pairs (like this bundle) over mixing cells from different orders, and not to expect every unit to hit the nominal number exactly.
This listing is for Flat Top. For Button Top, click here
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 | 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 (3.6V/3.7V Li-ion), 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: the MJ1's own standard charge current is 1.675A, meaningfully above the MC2's 1A per slot — expect a full charge in roughly 4.5-5 hours, both cells at once, a bit longer than lower-capacity cells in our MC2 bundle lineup since there's more capacity to fill and the charge rate is more conservative relative to the cell's spec.
Where the MJ1 Actually Fits
- High-capacity flashlights and headlamps running moderate-to-high output modes
- E-bike and e-scooter packs where 10A per cell in parallel is sufficient
- General electronics packs prioritizing energy density with more current headroom than pure energy cells
- DIY power banks and backup builds wanting more runtime per cell than lower-capacity options
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 MJ1. Given the batch-to-batch capacity variability noted in independent testing, this matters more than it would for a more consistent cell.
- 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
Can this charger handle the MJ1's full capacity safely? Yes. The MC2's 1A per slot is below the MJ1's own 1.675A standard charge current, so it's a conservative, safe rate — a full charge takes roughly 4.5-5 hours, both cells at once.
Why might my actual measured capacity come in under 3,500mAh? Independent testing has shown some batch-to-batch variation with this cell, with measured capacity sometimes landing in the 3,200-3,400mAh range depending on discharge rate and batch. It's still a genuine high-capacity cell — just worth knowing that the nominal figure is a typical rating, not a guarantee for every individual unit.
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 — and it's how LG manufactures this cell natively. If your device specifically calls for Button Top (a raised positive terminal), you'll want that version instead.
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.
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 LG INR18650-MJ1 Flat Top cells with a verified XTAR MC2 charger — ready for high-capacity flashlights, e-bikes, and general electronics out of the box.
Authentic LG 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.
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Perfect for camping. LG flat tops are high capacity.
LG INR18650-MJ1 and MC2. Great combo for outdoors.
Charges from any USB port. LG flat tops are reliable.
My SC64 runs for hours on these flat tops.
LG MJ1 3500mAh and MC2. Everything I need for EDC.
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.