These are the standard pigtails for pilots building aircraft to use with the BT2.0 connector batteries, like out world-famous 333man HV packs.
Check out our growing BT2.0 section HERE
Guys, until Chinese New Year is over I am pretty strapped for these pigtails. Please buy only what you need! I will have more later, and if you remind me i'll toss you freebies later!