The Topdon BT200 Battery and Charging System Tester showed up at exactly the right time. I’ve gotten a couple of sporadic check engine lights from a low-voltage code with no noticeable difficulty ...

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, ...

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 ...

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 ...

A battery management system (BMS) monitors and controls batteries in vehicles such as more-electric aircraft and electric cars. It needs to undergo rigorous tests under nominal and extreme conditions ...

Is your car battery more than 3 years old? It could be on the verge of dying, and you might not even realize it. Keep a closer eye on how much life it has left by purchasing one of the many car ...

Batteries are notoriously difficult pieces of technology to deal with reliably. They often need specific temperatures, charge rates, can’t tolerate physical shocks or damage, and can fail ...