This is the connector that would plug into your 2s batteries balance port (if your battery uses bullet connectors).
Features:
6 pcs solid design bullet connectors
Gold plated for super low resistance
Fits into any 2mm female bullet connector
Provides a large solder area that will fit up to 16 awg wire
Specs:
2.25mm diameter shaft: ensures a snug fit for a better connection
3.5mm diameter head: allows easy soldering for up to 16 awg wire
10mm shaft: promotes lower resistance and a better connection