FEMOBOOK A4Z GRINDERFemobook is a Taiwanese grinder manufacturer founded by a former 1Zpresso engineer, built on a simple premise: deliver exceptional grind quality and precision without unnecessary cost or complexity. The focus is on performance, practicality, and thoughtful design. The A4Z is a compact, battery powered, fully wireless electric grinder equipped with a 48mm stainless steel conical burr developed in collaboration with 1Zpresso. The burr geometry is based on the highly regarded ZP6, a filter focused grinder known for clarity, sweetness, and balance. The A4Z stands out for its tiny footprint, external burr adjustment, and impressively low retention. It delivers a clean, sweet cup profile with excellent consistency across brews. These qualities made it an ideal choice for our Souper Bowl competition in January 2026, where reliability, speed, and workflow mattered, and it performed beautifully throughout the competition. The grinder charges via USB C, disassembles easily for cleaning, and includes a magnetic wiper that effectively minimizes retention between doses. While optimized for filter brewing, the A4Z is also capable of espresso, especially modern turbo style shots, though grind times are slightly longer at finer settings. In our view, the Femobook A4Z currently represents one of the best value propositions in electric coffee grinders available today. Femobook covers new products with a 1 year warranty. FROM THE MANUFACTURER: Collaborate with 1Zpresso ZP6 stainless steel 48mm conical burr. The conical burr directs the powder straight down. More than 3 rotations adjustments, specialty design for pour-over. Every rotation is 100 clicks, 0.008 mm per click. With a small magnetic brush attaching the burr, reduce the retention. Rechargeable, changeable batteries, making grinder longer lifespan. 6000 mAh capacity, 30-50 times usage when fully charged. 90-Second Timer – Grinding stops after a 90-second cycle. Auto Stop – Charging ends when the battery is full. Disassembly and assembly without any tools. This product must be shipped via ground service due to the rechargeable lithium ion battery.
