What's in This Bundle
- 2x Samsung INR18650-30Q, 3000mAh, 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 18650 cells and a compact way to charge them — no separate charger purchase, no guessing whether a charger you already own is a safe match for these cells.
This listing is for Flat Top. Looking for Button Top? Click here to buy: Samsung 30Q Button Top + XTAR MC2 Bundle.
Why This Pairing Makes Sense
Flat Top is the standard terminal type for most modern devices — box mods, DIY battery packs, and the majority of current-generation flashlights and power tools that don't rely on spring-loaded contacts. Buying two cells together as a matched pair (rather than singles) means you're starting with cells from a similar batch, which matters for devices that run cells in series or expect 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 30Q 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 with this because it charges both slots at a full 1A simultaneously — no current-splitting trade-off for using both bays at once. It's a genuinely portable charger that doesn't ask you to sacrifice charge speed for its small size. If you're putting together a first 18650 kit and don't want to invest in a larger multi-bay charger yet, this bundle covers both pieces in one order.
Samsung 30Q — Battery Specs
| Parameter |
Value |
| Brand & Model |
Samsung SDI INR18650-30Q |
| Capacity |
3,000mAh (minimum ~2,900mAh) |
| Nominal Voltage |
3.6V |
| Full Charge Voltage |
4.2V |
| Discharge Cutoff Voltage |
2.5V |
| Max Continuous Discharge |
15A |
| Terminal Type |
Flat Top |
| Protection Circuit |
None (unprotected cell) |
| Weight |
~45-48g per cell |
These are genuine cells, verified against Samsung's official datasheet — not rewrapped or relabeled stock. See our full Samsung 30Q product page for detailed test data and authenticity-checking tips if you want to go deeper than what's covered 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 |
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 a full 1A per slot with both cells charging at once, a 30Q reaches a full charge from empty in roughly 3.5-4 hours, accounting for the tapering constant-voltage stage near the end.
This listing is for Flat Top. For Button Top, click here
Things Worth Knowing Before You Use This Kit
-
The 30Q 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 run these in a device with no low-voltage cutoff of its own.
-
Don't mix these cells with older ones you already own, even if they're also 30Q. Pairing cells from different ages or usage histories in a series/parallel setup can cause imbalanced charging over time.
-
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.
Frequently Asked Questions
Can this charger handle the Samsung 30Q's full capacity safely? Yes. The MC2 charges at a full 1A per slot, a safe, standard charging rate for a 3,000mAh cell — a full charge takes roughly 3.5-4 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, and DIY packs. 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. This bundle is set up for two 30Qs.
Is this kit protected-cell compatible? The MC2 supports protected 21700 cells if you use it for those later. The Samsung 30Q cells included in this bundle are unprotected bare cells, which is standard for this model.
What happens if I insert a cell backwards? The LED for that slot stays off rather than turning red or green, signaling a reverse-polarity or abnormal insertion — the charger won't attempt to charge until it's corrected.
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 30Q Flat Top cells with a verified XTAR MC2 charger — everything you need to get a dual-cell device running safely 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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