This is the Great Planes ElectriFly BP Series Lithium Polymer 640mAh 11.1V 15C Battery Pack with Balance Connector. Ideal for Bigger Park Flyers, Electric Airplanes up to Speed 400 and Small Electric Helis. FEATURES: Balancing allows all cells to fully Charge to 4.2V ensuring maximum power from the pack, plus conditions the cells better so they will last longer Safer as long as the Cell Balancer or a properly equipped Charger with Balancing Capabilities is used INCLUDES: Great Planes ElectriFly BP Series Lithium Polymer 640mAh 11.1V 15C Balance Battery Pack with 18AWG 3.1" (80mm) long Discharge wire with Dean"s Micro Plug and 24AWG 1.6" (40mm) long Charge Lead with Balance Connector and instruction sheet. REQUIRES: Great Planes Equinox Cell Balancer (GPMM3160) or equivalent or Charger with Balancing Capability SPECS: Capacity: 640mAh Number of Cells in Series: 3 Rated Voltage: 11.1V Max. Charge Voltage: 12.6V Min. Discharge Voltage: 7.5V Maximum Recommended Charge Current: 640mA Continuous Discharge Current: 9.6A (15C) Discharge Lead: 18AWG 3.1" (80mm) long wire w/Deans Micro plug Charge Lead: 24AWG 1.6" (40mm) long wire w/Balance Connector Pack Dimensions: 66x35x18mm (2.6x1.5x.7") Weight: 2oz (56g) COMMENTS: READ the ENTIRE instruction sheet included with battery before use 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 jxs 10/03/06 ir/jxs