A standard sized, widely available LiPo battery is required for Bluetooth editions but it's not included with the kit. You can source it on your own.Battery Specifications:Mammoth75: 3543114Mammoth20: 303450JST1.25
Due to the nature of mirror-polish treatment, there may be minor, unavoidable dust points/micro scratches on the mirror finish of the bottom case. Small dust points/micro scratches that are only visible in just the right angle of lighting, small scratches inside the keyboard case, or dents on the case that are not visible when the keyboard is fully built. These are normal and within our quality acceptance. Check more details here.