4N700AACW : 4.8 volt 700mAh rechargeable Ni-Cd AA-size RC receiver battery pack. Replaces typical standard 4.8 volt AA size stock Flat receiver battery (size about 2" tall x 2.25" across x 0.6" thick).  These battery packs are made in the USA by Batteries America!  Made with N700AAC "AA" size cells. The "700" means MORE RUNNING TIME than a 500mAh or 600mAh battery. They can be re-charged with most Stock Wall Chargers.  Choose Pack Shape, and choose wire leads or Connector from scroll-down menus. Connectors are extra money. Replaces Futaba receiver battery NR4J, NR-4J, NR-4QB, NR4QB, NR4M, NR-4M, FUTM1280, FUTM1295, NR-4J, FNR-4J etc;  HiTEC receiver battery 54111, 57404, 57401, etc; JR receiver battery JRPB3140 etc; AIRTRONICS receiver battery 95008Z, 95098Z, 95004Z, 95009Z, 95003Z.  Futaba J connector has the "lip" down one side.  The SPEkTRUM-JR-HiTEC-Z connector is the "universal" type (this one can also be plugged into Futaba) original AIRTRONICS connector has 3 "nubs" on the connector housing.

NR-4J = original part number for flat battery pack.
NR-4QB = original part number for square battery pack.*