Femobook A5 Electric Grinder Review┃Rogue Wave Coffee


【Ply - A World-Class Coffee Professional with Championship Titles】 

Ply Pasarj, a professional barista from Canada, is the 2024 Canadian National Brewers Cup Champion and the former coach of the 2023 World Brewers Cup Champion (WBrC).

With extensive experience in coffee brewing and competition, Ply has gained a solid reputation in the specialty coffee industry.

Meanwhile, Ply operates "Rogue Wave Coffee," a brand dedicated to specialty coffee, which has earned an impressive 4.8-star rating on Google reviews.

【Cordless Freedom – Enjoy Fresh Ground Coffee Anywhere】 

Based on Ply’s experience using the A5 electric coffee grinder, he noted that when grinding for espresso, pour-over, and Turkish coffee, a full battery charge allows approximately 40 grinding sessions.

Given his typical usage, he only needs to charge the grinder once per week. Ply finds this battery life exceptional, making it one of the standout features of this grinder[1].

Aside from its impressive battery life, Ply appreciates the convenience of this rechargeable cordless electric grinder. Without the hassle of tangled wires, it is easy to place on a home coffee bar or take it on the go. 

Although the A5 does not support quick charging, it can be conveniently charged using a standard phone charger, making it highly user-friendly. Ply genuinely enjoys the wireless design and long-lasting battery performance of this grinder[2].

Frank

Frank

Femobook's Editor

1. The A5 electric grinder is equipped with a high-capacity 6000mAh battery. The actual number of grinding sessions per full charge may vary depending on the type of coffee beans and grind size.

2. This grinder supports power bank charging and grinding while charging. It is recommended to use a USB-A charger with at least 5V1A output.


【300+ Grind Settings – Precision Like Stepless Adjustment】 

Ply highlighted that this electric grinder features over 300 grind setting options (previously stated as 400, corrected for accuracy), with each burr spacing precisely set at 0.008mm (previously mentioned as 0.08mm, corrected for accuracy).

Such fine adjustment capabilities make it easier to dial in the perfect extraction time for espresso. The level of precision in grind size adjustment feels almost like using a stepless coffee grinder[1].

Frank

Frank

Femobook's Editor

1. This grinder utilizes a stepped adjustment mechanism with a stainless steel bead for positioning in the adjustment ring. This design allows for quick and precise grind size switching between pour-over and espresso without worrying about grind size shifting.


【Tool-Free, Quick Disassembly in Seconds】 

Ply pointed out that the A5 electric grinder features a magnetic design, allowing for complete disassembly without any tools.

Additionally, a detachable magnetic cleaning brush is placed under the burrs, which helps remove residual coffee particles during grinding, ensuring all grounds fall smoothly into the grind cup, minimizing retention issues. Compared to other brands, the A5’s grind cup holds about 30g of coffee, offering a larger capacity.

Ply also noted that larger burr sizes improve grinding efficiency at the same grinding speed. The A5 electric grinder is equipped with a 53mm burr set, which is larger than other competing models, resulting in faster grinding speeds.

While he mentioned that installing the burr assembly might take some time to get used to, he does not think this is a drawback in overall usability, as the electric grinder remains intuitive and easy to operate[1].

Frank

Frank

Femobook's Editor

1. In response to feedback regarding burr assembly installation, we recommend removing the grind cup first and laying the grinder body flat for easier installation.


【Ply’s Review: Low Retention, No Bean Jams – A Must-Have Coffee Grinder】

According to Ply’s tests, when starting with a cold start method[1], the A5 electric grinder processes 15g of pour-over in approximately 19 seconds and 20g of espresso in around 58 seconds.

The grinder operates smoothly without any bean jams, and even without using the RDT method, grind retention is nearly zero[2].

Regarding flavor performance, Ply observed that the grinder enhances the brightness and clarity of pour-over, while for espresso, it effectively highlights the nuanced acidity.

Based on his espresso grinding results, he believes this grinder is ideal for making cappuccinos or flat whites, which require lower milk ratios.

In addition to its exceptional grind quality, Ply also appreciates the grinder’s stylish design, compact build, and portability. Whether used at home or carried on the go, the A5 electric grinder performs reliably. 

While the grind cup may have a limited capacity, making it less suitable for high-demand brewing, Ply considers this grinder an excellent choice for coffee lovers who prefer the convenience of an electric grinder yet demand professional-grade grind quality.

Frank

Frank

Femobook's Editor

1. A cold start refers to pouring all coffee beans into the grinder before starting operation, while a hot start means adding beans while the grinder is already running.

2. Grinding time varies depending on the type of coffee beans, grind size, and roast level.

 

Note: The content above is excerpted from the YouTube video by《Rogue Wave Coffee.

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