This is the Futaba BR3000 Battery Checker.
Features:
- A great accessory for battery "peace of mind"
- Quickly and clearly displays the voltage levels of your battery packs
- Total voltage and remaining capacity are shown on a bar graph and as a percentage
- Can check 2-7 cell LiFe, LiPo and Li-Ion packs, as well as 4-7 cell NiCd and NiMH packs
- Voltage of each cell of a lithium battery pack can also be displayed
- Automatic Lithium cell balancing operation to 5mV
- Operates on power supplied by the connected battery
- Know BEFORE you go just how much battery life you have!
Specifications:
Voltage Display Error: +/- 1.5%
Dimensions: 3.3x2.5x0.6" (85x63x15mm)
Weight: 1.8 oz (52.6 g)
Total Voltage (Ni type): 4.0-17V
Total Voltage (Li type): 5-34V
Cell Voltage (Li type): 1.1-4.9V
Operating Temperature: -10 to +45°C
Storage Temperature: -20 to +60°C