Adafruit
Single Li-Ion and LiPoly Battery Power Meter
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$5.90
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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 (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
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