Thingiverse
Simple CR2032/CR2016 battery tester by wavexx
by Thingiverse
Last crawled date: 3 years ago
Dead-simple battery tester for CR20?? coin-button batteries. Provides a light load to test the battery. Bright led = good.
The little prongs sticking in the front can be used with crocs attached to a voltmeter in order to test more conveniently several batteries in a row.
Materials required:
100 ohm resistor (either 1-5%)
Rectangular 2.3x7mm, 2.5V LED (Kingbright L-153IDT or equivalent)
1 paperclip
Construction:
Print the holder. Cut the paperclip in two, separating the two V-shaped parts to be used as contact points. Stick the two halves in the battery slot, sliding them through the holes. Cut the ends to size, leaving 3-4mm for soldering. Insert the remaining bits from the paperclip in the front holes. Insert the LED, respecting polarity (as shown in the diagram image). Bend the positive leg of the LED and solder. Use the 100R as a bridge between the battery and LED on the negative.
Fill with hot glue in order to improve stability of the battery contacts.
When cooled, glue the bottom cap.
The little prongs sticking in the front can be used with crocs attached to a voltmeter in order to test more conveniently several batteries in a row.
Materials required:
100 ohm resistor (either 1-5%)
Rectangular 2.3x7mm, 2.5V LED (Kingbright L-153IDT or equivalent)
1 paperclip
Construction:
Print the holder. Cut the paperclip in two, separating the two V-shaped parts to be used as contact points. Stick the two halves in the battery slot, sliding them through the holes. Cut the ends to size, leaving 3-4mm for soldering. Insert the remaining bits from the paperclip in the front holes. Insert the LED, respecting polarity (as shown in the diagram image). Bend the positive leg of the LED and solder. Use the 100R as a bridge between the battery and LED on the negative.
Fill with hot glue in order to improve stability of the battery contacts.
When cooled, glue the bottom cap.
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