This is the Great Planes Electrifly Four Output DC Powered Battery Charger for Lithium-Polymer Batteries.  These are great for charging multiple packs at the same time.  This charger is not for use with NiCd, NiMH or Lithium-Ion batteries.

FEATURES:

• Four outputs independently charge 1-4 cell Lithium-Polymer batteries
• Automatically detects number of cells on each output-no switch to set "Constant current/constant voltage" charge method
• Each output features push-button start/stop control, three-hour safety timer and dial to set battery capacity from 300mAh-3000mAh
• Audio and tri-color LEDs provide warnings for improper input voltage and output reverse polarity
• Built-in cooling fan
• Reverse polarity and current overload protection on input
• One year limited warranty (USA and Canada only)

INCLUDES:
One Great Planes Electrifly Lithium-Polymer battery charger with alligator clip input connectors & banana jack charge outputs
Instruction manual

REQUIRES:
Power supply or 12V automotive battery
Charge leads w/banana plugs and battery connector to match battery

SPECS:
Input Voltage: 12-15V DC
Number of Outputs: 4
Input Connectors: Alligator clips
Case Size: 8.2" x 1.5" x 5"
Weight: 21.8oz (617g)

Output Specifications:
Battery Type: 1-4 (3.7-14.8V) Lithium Polymer cells only
Charge Control: Push-button
Charge Termination: "Constant current/constant voltage"
Battery Capacity Range: 300-3000mAh
Fast Charge Current: 300mA-3.0A
Status Indicators: Tri-colored LED and audible buzzer
Charge Output Jacks: Banana jacks
Safety Timer: 3-hour maximum charge time
Fuse: 20A replaceable auto type spade fuse