Yes, if you want to warm brew, it will heat up the water if it is cold by itself. The machine will heat up the water till the point where it is 96° degrees celcius (about 205℉). If you add hot water upfront, the heating time will significantly decrease and you will save a lot of battery capacity.

Due to the air pressure, the coffee might not be able to come out, and the coffee grounds might block the inner tube and prevent the coffee from draining. Please use purified water only before brewing. Run the device with cold water before each use, no need to install the portafilter; simply double-click the button for extraction. Not only cleans the inner parts but also prevents issues. If blockage occurs, invert the device, remove the portafilter, and pour cold water into the outlet. Double-click the button to release pressure and resolve the problem.

The ideal performance of the Espresso machine is achieved with a 50ml water extraction, resulting in a 30ml espresso shot. To optimize your brewing, I suggest consistently using 50ml, allowing for 5 cups on a full charge. However, if you opt for 80ml water usage, the machine's capacity reduces to extracting only 3 cups.

It takes about 3 minutes to heat up a full reservoir. This is very dependent on the temperature of the water that you put in.

It takes 3 ~ 3.5 hours to fully charge it under this power adapter. It can also be used for charging 12V/24V car chargers in car.

Yes, but we recommend to use it when it is fully charged and unplugged.

Both 220V and 240V can be charged as long as the charging adapter supports it. Please note that the output voltage of the adapter is at least 5V and the output power is at least 10w.

No, you can simply wash the adapter where the coffee goes in very quickly with a sponge and detergent. However, do not use boiling water to wash the fuselage shell.