These are the wire side housings of JST style connectors that need terminals crimped to the ends of wires to form a full connector. These types of connectors are used in a verity of places, but specifically they are useful for:
XH 2.5mm: Standard connector for RC battery balance leads.
PH 2.0mm: A verity of single cell power connections for low power devices like mesh radios and other small modules.
HY 2.0mm: Balance lead connectors used on the JBD BMSs we sell.
NOTE: HY connector housings have never actually been produced by JST, but are included in this category, as they are closely related, and the original manufacturer isn't known.
