SX Mini box mods compared, our top 5 YiHi choices

An SX Mini mod is easy to spot, with its crisp screen and a chipset with a strong reputation. Choosing one is harder. Retailers file the brand by category, published reviews look at one device at a time, and few pages line up the boxes that are still in the catalogue. We compared them on three practical points, the cells and the size, the charging, and the resistance and voltage ranges.

Which SX Mini mod should you pick first?

Our number one is the SL Class V2. This single-cell SX Mini box takes an 18650, 20700 or 21700 cell, reaches 100 watts and offers both of the brand's temperature control styles, constant and dynamic, at 136 grams.

The G Class V2 takes over as soon as you want two cells and 200 watts. The MQ Class remains the way in, compact and capped at 60 watts, the MQ Plus sits between the two, and the MX Class only makes sense if you want to adjust the mod from an app.

The SX Mini comparison table

The table follows the product pages of the official SXmini website, the box mod brand of YiHi. None of these mods ships with a cell, and the charging column gives the port and the maximum current listed.

Model	Chipset	Cells	Power	Resistance	Charging
G Class V2	SX750	2 x 18650	10 to 200 W	0.05 to 3 ohms	USB-C, 5 V / 2 A
SL Class V2	SX730	1 x 18650, 20700 or 21700	5 to 100 W	0.1 to 3 ohms	USB-C, 5 V / 1 A
MQ Plus	SX418J	1 x 21700, 20700 or 18650	5 to 100 W	not stated	USB-C, 5 V / 2 A
MQ Class	SX416J	1 x 18650	1 to 60 W	0.1 to 3 ohms	USB-C, 5 V / 2 A
MX Class	SX480J-BT	1 x 18650	5 to 75 W	0.05 to 3 ohms	micro-USB, 5 V / 1 A

Two families stand out. The G Class V2 is alone in the dual-cell group, while the other four share the single-cell ground between 60 and 100 watts.

Our top 5 SX Mini mods, one by one

Each model suits a clear profile. They appear in the order of our ranking, with what earns them their place and what might hold you back.

1. SL Class V2, the best balance

The SL Class V2 measures 89.1 x 42.95 x 30.17 mm and has a 0.96 inch IPS colour screen. Its SX730 chipset delivers 5 to 100 watts at 0.7 to 8 volts.

Its strength is flexibility on power. An 18650 keeps the box light, a 21700 adds capacity without changing mod. Temperature control can be set to constant or dynamic mode, as you prefer.

2. G Class V2, the most complete dual-cell mod

The G Class V2 weighs 150 grams for 94 x 47.7 x 34.3 mm. Its SX750 chipset covers 10 to 200 watts and reads resistance to a ten-thousandth of an ohm, which sharpens temperature control.

It takes atomisers up to 30 mm wide and updates over WiFi, with no computer needed. Its Smart Boost function preheats the coil only when it needs it. The drawback is its footprint, clearly wider than a single-cell box.

3. MQ Plus, the 100 watt single-cell option

The MQ Plus takes the idea of the MQ Class further. Its SX418J chipset reaches 100 watts, and the box takes a 21700, 20700 or 18650 cell.

It charges over USB-C at 5 V and 2 A, and its firmware updates over USB. Its page gives neither its dimensions nor its resistance range, two details to check in a shop before buying.

4. MQ Class, the pocket format

The MQ Class is the narrowest SX Mini among those whose page gives measurements, at 36.7 mm wide and 76 mm tall. Its SX416J chipset delivers 1 to 60 watts from an 18650 cell.

YiHi builds in dry hit protection and a buck-boost circuit, which aims for steady power from a full cell to a low one. It is enough for a standard tank and a measured vape.

5. MX Class, for app control

The MX Class pairs a TFT colour screen and a joystick with Bluetooth, through an app for Android and iOS. Its SX480J-BT chipset covers 5 to 75 watts from an 18650 cell.

It closes the ranking for a simple reason. Its micro-USB port, limited to 5 V and 1 A, is the only one in the table that is not USB-C.

Three practical points to separate SX Mini mods

Shop listings put the chipset and the top wattage first. Three other figures matter more once the mod is in use, and they vary noticeably from one model to the next.

Size and cell format

Cell format sets the size. The MQ Class, built for an 18650, is no wider than 36.7 mm, while the SL Class V2, which accepts a 21700, reaches 42.95 mm. With two cells, the G Class V2 is over 47 mm wide and sits awkwardly in a pocket. The same trade-off between cells and footprint shows up in our Aspire mod guide, where built-in battery models sit alongside cell-powered ones.

Charging port and current

Charging reveals a gap that the listings never mention. The SL Class V2 accepts 5 V and 1 A through its USB-C port, while the MQ Class, the MQ Plus and the G Class V2 go up to 5 V and 2 A. On paper, twice the current shortens charging through the mod's own port. Retailers of the MQ Class still advise keeping USB charging for emergencies and using an external charger.

Resistance and voltage ranges

The minimum resistance separates two uses. Going down to 0.05 ohm, the G Class V2 and the MX Class suit a rebuildable atomiser built very low. The MQ Class and the SL Class V2 stop at 0.1 ohm, which comfortably covers standard tank coils. On voltage, the SL Class V2 and the MQ Class reach 8 volts, the G Class V2 6 volts.

FAQ

Five practical questions that come up before buying one of the brand's mods, beyond the ranking.

How can you check that an SX Mini is genuine?

The brand offers an online check called ID Query. The ID, a mix of letters and numbers, is usually found on the bottom of the mod or on the box, and the result shows the product name, the chipset and the production date. It is a sensible step on the second-hand market.

Does an SX Mini work with a standard tank?

Yes. Resistance ranges go up to 3 ohms, which covers mouth-to-lung coils. On the MQ Class, two retailers list a maximum atomiser width of 24 mm. In the UK, refillable tanks are limited to 2 ml, and nicotine e-liquid is capped at 20 mg/ml in 10 ml bottles.

Do you need to update the firmware?

It is not required, but several models allow it. The MQ Plus updates over USB and the G Class V2 over WiFi. An update can fix a fault or add a feature, so it is worth checking the model's page from time to time.

Why is the cell not included?

The brand's mods leave the choice of format and capacity to the user. Plan for a cell from a recognised maker, in a format your model accepts, and two identical cells bought together for a dual-cell mod.

What does a standby current under 20 µA mean?

It is the current the mod draws from the cell when it is not firing. The lower it is, the less the cell drains while the mod sits in a drawer. The MQ Class, the MQ Plus and the G Class V2 list this figure.

Which SX Mini suits which vaper

The verdict follows the profile. For a first cell-powered mod, the MQ Class brings the brand's chipset in a compact format. An experienced vaper who sets temperature will be well served by the SL Class V2, our number one, and anyone running very low or wide rebuildable atomisers should look at the G Class V2.

The MQ Plus suits vapers who want a 21700 and 100 watts without going high end, the MX Class those who want phone control. Before ordering an SX Mini, check the cell format, the charging port and the minimum resistance. Those three checks apply to any regulated box mod, whatever the brand.

Related reading

• The best Aspire mod for each type of vaper, compared, to compare with another box mod range.
• Vaporesso Armour GS, the 18650 pod mod, for an 18650 cell in a pod format.

Written for adults aged 18 and over. Nicotine is a highly addictive substance, and nicotine vaping products are not for sale to anyone under 18 in the UK. This article is editorial information only and is not a purchase recommendation.