mah

Sorry for such a stupid question but I definitely need help. I went to rewrap some of my married batteries. I had 2 different sets with 2 different mah. I already removed the old wrap... Now how can identify wich batteries all match? Thanks in advance.

Hey all, I recently got a Snowwolf 365 and got 4 batteries at that time. 3 of them a E-SYB 18650 3.7V 3500mAh with a 30A discharge current, and one is an E-SYB 18650 3.7V 2800mAh with a 49A discharge current. My question is; is it safe to use all 4 together or would that damage my mod myself in...