John Carlsen has more than a decade of experience testing and reviewing home tech products, with a major focus on smart home security. He earned his BS in journalism from Utah Valley University. In ...

The importance of keeping temperature constant in an environmental chamber. Proper test results means the cell's interior must be at a setpoint temperature. Issues with testing cells at room ...

Proper precision calibration resistors are expensive and usually bulky, often in a large box or can. These are overkill for low-cost handheld digital multimeters (DMMs) and LCR Meters, especially when ...