What's the difference between a conductance battery tester and a load tester?

Conductance (digital) testers like most TOPDON, FOXWELL and ANCEL units measure internal resistance and estimate CCA in seconds without draining the battery, making them safer for frequent checks. Traditional load testers, such as the Battery Tender unit, apply a real amp draw to see how voltage holds under stress, which some users feel gives a more 'real-world' picture but generates heat and takes longer. Most modern buyers in this pool gravitate to digital conductance models for speed and added alternator/cranking tests.