This is the Great Planes ElectriFly Lithium Polymer 600mAh 7.4V 25C Battery Pack with Balance Connector. 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 Lithium Polymer 600mAh 7.4V 25C Balance Battery Pack with EletriFly Balance Connector, Deans Micro Connector, and Instruction Sheet REQUIRES: Compatible charger such as the Great Planes ElectriFly 2S 7.4V AC/DC Micro LiPo Balancing Charger with AC and DC Adapters (GPMM3321), or with Balancing Charger with Car Adapter only (GPMM3322) SPECS: Capacity: 600mAh Number of Cells in Series: 2 Rated Voltage: 7.4V Discharge Current: 25C (5A maximum) Maximum Recommended Charging Amps: 0.6A Pack Dimensions: 2.1 x 1.2 x 0.47" (52 x 31 x 13mm) Weight: 1.2oz (35g) 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 08/21/12 ir/jxs