This is the Reedy WolfPack 2S 7.4V 5500mAh LiPo Battery Pack from Associated.

FEATURES:
Crash resistant molded hard plastic case
ROAR approved
Suitable for sport or competition usage
4mm female bullet connectors for positive (+) and negative (-) terminals
2mm terminal for balancing

INCLUDES:
Reedy WolfPack 2S 7.4V 5500mAh LiPo Battery Pack

REQUIRES:
LiPo compatible charger and balancer
LiPo charging bag

SPECS:
Capacity: 5500mAh
Voltage: 7.4V (2S)
Dimensions: 5.5 x 1.8 x 0.99" (139 x 47 x 25.1mm)
Weight: 10.6oz (301g)
Max Charge Current: 11.0 (2C)
Max Cont. Discharge Current: 60C (330A)
Burst Discharge Current: 80C (440A)

COMMENTS: ALWAYS use a LiPo-approved Charger
ALWAYS use a LiPo Cell Balancer
NEVER Charge over 4.2V per cell
NEVER Charge at currents greater than 1C
NEVER Charge through the "To ESC or "DISCHARGE" lead
NEVER Trickle Charge
NEVER allow to Discharge below 2.5V per cell
NEVER disassemble or modify pack wiring in any way or puncture cells
NEVER place on combustible materials or leave unattended during charging
ALWAYS Charge in a fireproof location
ALWAYS set charger's output volts to match battery volts
ALWAYS keep out of reach of children
All weights include wire leads and plugs