WARNING!
I purchased mine in June of 2021 and now in August of 2022 (slightly over the 1 year warranty) the battery is expanding and has broken out of the case in the front and back by at least 1/4 inch. literally breaking the chassis front and rear panels. It may continue to expand and/or possibly explode. This happened while the unit was just sitting on the desk, not being used or charged. The unit is now useless of course. Needless to say I am VERY DISSAPOINTED in Cayin. I will contact the company about it of course but haven't done so yet. I just noticed it today.