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

Most handheld devices use alkaline or rechargeable batteries, and measuring the battery capacity is a crucial feature of such designs. Most of the time, however, using a battery level monitoring IC ...

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 ...

When it comes to car problems, nothing is ever convenient. It seems like your vehicle plots the perfect moment to give you grief, and the majority of the time it involves a dead battery. While it’s ...

Testing your battery regularly will prevent a dead battery from ruining your day. There’s only one way to answer the question, “Is it my battery, or something else” when your car won’t start: Hook up ...

Disconnecting the battery while the engine is running isn't a valid test for alternator function and may damage sensitive electronic parts. Instead, use a common voltmeter and the following test ...

Up to now, this battery level indicator design was limited to 12 & 24V applications. In past circuits, the use of fixed resistors greatly simplifies setup. However, fixed resistors resulted in ...