Adafruit
Single Li-Ion and LiPoly Battery Power Meter
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$5.75
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This small, palm-sized battery power meter has a small display that shows off how much juice is left in your single Lithium Ion/Polymer rechargeable battery....
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This small, palm-sized battery power meter has a small display that shows off how much juice is left in your single Lithium Ion/Polymer rechargeable battery. The color display has four levels of power indication once battery capacity becomes 100%, 75%, 50%, and 25%. When power is below 25%, only the red battery frame lights up.
The design is pretty basic, it's just doing basic voltage comparisons, and of course, it will drain any battery it is connected to - but for beginners, this is a pretty easy way to check single 3.7V/4.2V Lithium Ion or Lipoly batteries.
Comes with two bare wire ends, connect black wire to ground, red wire to positive - check your battery for the polarity because batteries not from Adafruit may have a different connector setup.
Note: PCB may come in green or blue. Battery not included.
Jargon buster
Plain-language definitions for the technical terms used above.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
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