Daryl Bueno is a specialty-coffee content creator who focuses on practical home brewing and gear walkthroughs. In this review, he shares what it’s been like using the Femobook A2 coffee grinder — covering battery use, grind adjustment, cleaning, and how the grinder fits into real day-to-day brewing.
Below is a recap of Daryl’s key observations and comments from the video.
【Strong Battery Life × Replaceable Battery × Pass-Through Support】
Daryl points out that the A2 is battery-powered and lists its capacity at 4,000 mAh (as stated on the website).
After using it for about a month, he mentions he hasn’t recharged it yet, and notes that the battery indicator dropped from four bars to three.
【Replaceable Battery】
Daryl also points out that the A2 uses a replaceable battery module. [1]
A full charge delivers approximately:
• 80 grind cycles for filter settings
• 20+ grind cycles for espresso settings [2]
Frank
Femobook's Editor
2. Actual grind counts per charge can vary depending on bean type and grind setting.
【Pass-Through Charging】
The A2 charges via USB-C. Daryl highlights that it supports pass-through use [1], saying: “Not every device can do that.”
He demonstrates connecting it to a power bank—the indicator blinks while charging—and then shows the grinder can still be powered on and grind while plugged in.
Frank
Femobook's Editor
【Tool-Free Disassembly for Easy Cleaning—even Outdoors】
In the video, Daryl breaks down the A2’s design and construction, and reacts to how straightforward it is to take apart and maintain.
He describes it as “can’t believe how simple this is”—and sums it up as “very easy to clean.”
He demonstrates the A2’s modular build: the catch cup attaches magnetically, and the burr module comes off with a simple twist-lock motion, allowing the main parts to separate quickly.
Key components around the burrs—including the burr set, axle, spring, and washer—can be removed in just a few steps for thorough cleaning.
Daryl also points out that even outdoors, you can open the grinder up, clean it, and put it back together without any tools.
【120 Grind Settings: From Espresso to Cold Brew】
When discussing grind range, Daryl explains that the A2 offers 120 grind clicks, with 0.018 micron adjustment per click.
He notes that these fine adjustments allow the grinder to cover a wide range — from espresso through filter and up to French press and cold brew.
He sums it up with: “this really is an all-around grinder.”
【Burr Protection: Auto Stop and Auto-Reverse】
Daryl highlights the A2’s auto-reverse function, designed to address bean jams.[1]
When grinding dense coffees (such as some beans from Africa or Panama), the A2 can:
-
automatically reverse and try to release the blockage
-
then resume grinding
Although he hasn’t personally encountered a jam, he still remarks: “Isn’t that amazing?”
Frank
Femobook's Editor
1. The auto-reverse function is primarily designed to help clear bean jams. If the grinder encounters resistance that it cannot resolve, it will stop automatically to help protect the burrs and motor.
** Please avoid any foreign objects entering the grinder. Before grinding, check your beans for small stones or other debris to prevent burr damage. **
【Daryl’s Overall Impression of Femobook A2 Grinder】
At the end of the video, Daryl says he “really, really, really” enjoys using the Femobook A2, adding that he brings it along when traveling and appreciates how space-saving it is when packed.
Throughout the video, it’s clear that he values the A2’s practicality in everyday use — especially its tool-free disassembly for cleaning, solid battery life, replaceable battery design, and wide grind range that covers everything from espresso to cold brew.
At the end of his video, Daryl mentions he will also publish a particle-distribution analysis of Femobook A2. If you’re interested, see:
Femobook A2 Particle Distribution | Tested by Coffee KOL Daryl Bueno
Note: The content above is excerpted from the YouTube video by《Daryl Beuno》.
