From what I have read you don’t need a spacer with the S3. Source: post#11 here: New batch S3 in stock( protected 18650 lithium fits),new batch C8 next week
From what I have read you don’t need a spacer with the S3. Source: post#11 here: New batch S3 in stock( protected 18650 lithium fits),new batch C8 next week