Abstract: Simple test circuit using a comparator and reference to measure battery drain. Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS BATTERY MANAGEMENT MEASUREMENT CIRCUITS Keywords: comparator, reference, low-power, hysteresis, comparators Sep 30, 2002 APPLICATION NOTE 527 Simple Circuit Measures Battery Drain Abstract: Simple test circuit using a comparator and reference to measure battery drain. Measuring battery life for a portable system is a time-consuming task, and the methods that accelerate battery discharge don't provide reliable results. In the usual approach you simply measure elapsed time while operating the product to the point of battery discharge. Running several such systems in parallel obviously gives more data, if you can afford to tie up the lab equipment. You can try to derive battery life from dat……