10BK-3MCCAW : 6.0 volt 4000mAh eneloop READY-TO-USE rechargeable NiMH battery for R/C hobby.  The eneloop NiMH cells are PRE-CHARGE, and they retain their charge when not in use. Weighs about 9.9 ounces (280gms).  Dimensions 3" x 2" x 1 1/8".  Available with JR-HiTEC-SPEkTRUM connector or Futaba connector.  Includes EC3 power connector.  Manufactured in USA by Batteries America.