The XT90 is a popular battery connectors commonly used in Electric Vehicle battery backs and other RC or Drone applications. The XT90-S version comes with an in-built load resistor to avoid sparks that generally occur when connecting battery terminals.
To provide reliable electrical and mechanical performance in a compact high temperature environment, Molex has designed a new Wire-to-Board connector called the Micro-Lock Plus.
RS232 connector is a port used for data exchange between equipments. It was designed for data exchange between DTE (Data Terminal Equipment) or PC and DCE (Data Communication Equipment) or MODEM. The need for RS232 came from limitations raised by parallel data exchange.