The BT189 Battery Tester is a Crazy Voltmeter @JulianIlett
The BT189 Battery Tester is a Crazy Voltmeter @JulianIlett
Uploaded March 2024 | Updated September 2026, 2 weeks ago
It measures the cell voltage and latches it. It doesn't show real-time data.

aliexpress.com/item/1005006117710549.html
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The BT189 Battery Tester is a Crazy Voltmeter

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