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The JST RCY-series connector is a 2.5mm-pitch and manufactured by J.S.T. Mfg. Co., Ltd. [8] It is known in radio control circles as the battery eliminator circuit (BEC) or P connector. JST also produces other types of connectors that are used in R/C and hobby electronics. [9]
A connector more closely resembling the present-day twist-on type was patented in Canada by Marr in 1931, and in the US in 1933. "Wire Connector", Canadian Patent CA 311638 Issued 26 May 1931. "Wire Connecter" U.S. patent 1,896,322, Filed November 24, 1930, Patented February 7, 1933
Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...
This may allow for one switched receptacle for a lamp, or for two separate supply circuits when heavy loads are anticipated. Two branch circuits may optionally share a common neutral wire terminating on duplex receptacles, a condition sometimes referred to as "split-wiring", "split-receptacle", [45] or "half-split".
JST manufactures numerous series (families) and pitches (pin-to-pin distance) of connectors. [2] [3] JST connectors are used in many types of products, and commonly used by electronics hobbyists and consumer products for rechargeable battery packs, battery balancers, battery eliminator circuits, 3D printers, and radio controlled servos. [4]
Larger external battery packs use a variety of connectors, including the Anderson Powerpole MultiPole series (as used by Tripp Lite), which are color-coded and keyed for specific voltages. Very large batteries as installed in battery rooms such as are found in datacenters use bolted connections from cell terminals to bus bars or flexible cables .