Why Choose the ANENG BT189 Battery Tester?. 1 × ANENG BT189 Universal Battery Tester. Model BT189. Take the guesswork out of battery life. Quickly check the remaining capacity of N, D, C, AA, AAA, 9V (6F22), and 1.5V/3V button cells (CR2032, 14500, 10440, 16340).
