Moderate drop: Indicates partial aging — monitor closely and retest soon. Severe drop or collapse: The battery is nearing end-of-life or has an internal fault. Tracking battery load test results helps ...

I salvaged a large batch of 18650 cells from old laptop batteries and needed a way to figure out which ones were still worth using. In this video I walk through a 4-channel 18650 charger, discharger, ...

We may receive a commission on purchases made from links. If you've had to replace the battery in an Apple AirTag, you've seen a CR2032 battery up close. The performance of the 3-volt CR2032 lithium ...

The importance of calibration for all electronic test equipment. The main reason why such equipment must be regularly calibrated. The pros and cons of self-calibration or using outside services. It’s ...

Measuring rise time for a power source. Voltage vs. time signals measurements via a scope. A practical setup for battery testing. I was recently asked a question about a dc power supply, aka a voltage ...

An unavoidable reality of owning a car is dealing with a 12V battery. What voltage should a healthy, fully charged 12V ...