5BK-3MCCAW: 6.0 volt 2000mAh eneloop rechargeable Ni-MH receiver battery packs.  PRE-CHARGED & READY TO USE. Made with 5 x eneloop 2000mAh AA-size cells.  These are Nickel Metal Hydride batteries; they are High-quality, high-capacity, memory-free, and have long storage life.  They RETAIN THEIR CHARGE when not in use!  
This pack replaces most 6v AA size or A size assemblies. Direct replacement-upgrade for Onyx # ONXM2112.
Choose Pack Shape, and choose wire leads or Connectors from scroll-down menus. Connectors are $ extra.
These premium-quality battery packs are made by US right here in the USA !!
Pricing reflects options chosen.  
Dimensions of flat pack: 2 7/8" x 2" x 0.6".  Weight = approx. 4.8 ounces.
Enhancements / Add-on Options: NEW - extra EC3 (blue) Charging Connector can be added, OR a red T Ultra power connector can be added, for about $6.00 more.  This heavy-duty Charging Connector comes with 16GA wire, about 8" long.  See menu choices when ordering.
Recommended chargers: RCC-2S-10A, H6AC, HiTEC RDX1, RDX2, RDX4.