MHW-3BOMBER Mini Coffee Scale with Timer

Battery life is one of this scale's strongest points. Reviewers report getting anywhere from 1 to 6 months between charges with daily use, thanks to the auto-on/auto-off gravity sensing that eliminates idle battery drain. It charges via USB-C, so no fiddling with coin cell batteries. One important caveat: you need to use a charger rated at 5V and 1-2A. Using a fast charger (3A) can damage the battery or charging circuitry — multiple reviewers flag this, and the specs aren't printed on the device itself, which is a design oversight.

Use a USB-C charger rated at 5V and 1-2A — this is critical. Multiple reviewers warn that using a fast charger rated at 3A or higher can damage the charging circuitry or battery. The frustrating part is that MHW-3BOMBER doesn't print the voltage or amperage specs on the device itself, so you have to know this going in. A basic phone charger or a USB port on your computer will typically work fine. Avoid plugging it into high-powered USB-C adapters designed for laptops or tablets.

It's surprisingly simple. Place the scale on your countertop or drip tray — it turns on automatically thanks to the gravity-sensing feature, so there's no power button to press. Set your cup or portafilter on top and it auto-tares. For espresso, use the smart mode: it detects when liquid starts flowing and automatically starts the timer while calculating your brew ratio (liquid-to-grounds). When you're done, just lift everything off and it powers down on its own. The auto-on and auto-timer features eliminate most of the button-pressing that other scales require, though a few users find the button layout confusing at first for switching between modes.

It's actually one of the best entry-level precision scales for someone just getting into espresso. The auto-on gravity sensing means there's no power button to fumble with, the auto-timer starts when liquid is detected so you don't need to coordinate button presses while pulling a shot, and the display is easy to read. Reviewers specifically highlight the low learning curve and the affordable price compared to premium scales. Tutorial videos are also available online. The only beginner friction point some mention is the button layout for switching modes, which can be confusing initially.

With 0.1g precision up to 2kg capacity, this scale is accurate enough for espresso dosing where fractions of a gram matter. Fifteen reviewers specifically mention its precision and accuracy as a top strength. To verify yours is reading correctly, you can test it with a known calibration weight or even a nickel (which should weigh exactly 5.0g). One thing to note: some users report the readings can be affected by static interference in rare cases, so keep it away from strong electrical fields.

Absolutely — while it's marketed heavily toward espresso, reviewers confirm it works great for V60 pour-over, AeroPress, French press, and moka pot brewing. The 2kg capacity handles any home brewing vessel, and the 0.1g precision is useful for weighing coffee beans regardless of your brew method. The built-in timer is just as handy for tracking a 3-minute French press steep as it is for a 25-second espresso shot. Some users even pair it with a 3D-printed portafilter base for better positioning with specific setups.

If your MHW-3BOMBER is giving inconsistent readings, there are a few things to check. First, make sure the surface it's sitting on is level and stable — any wobble will throw off readings. Second, one reviewer noted possible static interference sensitivity, so try moving it away from other electronics. Third — and this is important — make sure you're using a proper 5V 1-2A charger, not a fast charger rated at 3A or higher. Using the wrong charger can damage the internal components and lead to erratic behavior. If the scale is more than a year old and readings are drifting, it may unfortunately be a durability issue that some users have reported.

For espresso and pour-over, you want three things: 0.1g precision (not just 1g), a built-in timer, and a compact footprint that fits under your machine. The MHW-3BOMBER ES6029B checks all three boxes. Its gravity-sensing auto-on feature is a standout — you don't even need to press a button to start weighing. If you're comparing it to premium scales like the Acaia Lunar, this one offers similar core functionality at a fraction of the price, though you do trade off some long-term durability.

The display shows weight in grams to one decimal place (e.g., 18.3g) and is easy to read according to multiple reviewers. In smart espresso mode, you'll also see a timer counting your shot and a brew ratio displayed as a ratio of liquid output to coffee grounds. There's also a mute function if you want to silence the beep notifications. The display is bright enough to read even when the scale is tucked under an espresso machine's drip tray.

The key features to prioritize are precision (0.1g is the sweet spot for espresso dosing), a built-in timer for tracking extraction time, and responsiveness — a slow scale makes dialing in shots frustrating. The MHW-3BOMBER scores well on all three according to users, with reviewers specifically praising its fast response time. Other practical considerations: USB-C rechargeable beats dealing with coin cell batteries, and a compact size matters if you're fitting it under a portafilter on machines like the Breville Bambino Plus or Gaggia Classic Pro.

Yes, it does. You can mute the beep notifications, which is a nice touch if you're pulling early morning shots and don't want to wake anyone up. Three reviewers mention the mute function as a feature, though it's not something most people list as a deciding factor — more of a thoughtful convenience.