Kitronik Battery Tester Project Kit Description This kit uses a single AA battery holder into which the user places a battery. LEDs then illuminate to show the remaining capacity of the battery. The circuit uses a quad operational amplifier to provide a reference voltage and comparators to determine which LEDs should go on. This makes it a great kit for studying operational amplifiers. Testing of https://elecena.pl/product/19046572/kitronik-battery-tester-project-kit 2021-07-12 https://elecena.pl/product/19046572/kitronik-battery-tester-project-kit 2025-07-09