What's in This Bundle
- 2x Samsung INR18650-35E, 3,450mAh, 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.
This listing is for Flat Top. Looking for Button Top? Click here to buy: Samsung 35E Button 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. Flat Top is the standard terminal type for most current-generation devices — box mods, DIY packs, and the majority of flashlights and power tools that don'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 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 |
Flat 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 Flat Top. For Button 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 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
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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.
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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.
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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.
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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.
How to get started:
Plug the MC2 into any USB-C power source (5V 2A recommended).
Insert the two 35E cells, ensuring the positive (+) flat top faces the indicator lights.
The red LED will turn on; wait for the green LED to confirm a full charge (~4.5 hours).
Unplug and use — you're ready to go.
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.
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 — it's the standard for most current mods, flashlights, power banks, and DIY packs. If your device specifically calls for Button Top (a raised positive terminal), you'll want that version instead.
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 Flat 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.
Fast & Tracked Shipping (US/EU/UK/AU/CA).
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