The Inovonics BAT604-50 is a 50-pack of the BAT604 Duracell DL123A lithium battery used in the EE1210, EE1210W, EE1212, EE1215, EE1215W, EE1216, EE1260, EE1261, EE1262, EE1265, EE1242, EE1247, EE1702, EE1722, EE1723, EN1210, EN1210W, EN1210EOL EN1212, EN1215EOL, EN1215WEOL, EN1216, EN1260, EN1262, EN1265, EN1242, EN1247, EN1249, EN1702, EN1722, EN1723, EN1501, EN1501-XL, EN1501-EXT, ES1210, ES1210W, ES1212, ES1215, ES1215W, ES1216, ES1260, ES1262, ES1265, ES1242, ES1247, ES1702, ES1722, ES1723, ES1501, FA100, FA130, FA202, FA206B, FA206I, FA206S, FA206C, FA206DS, FA207, FA210, FA210W, FA250, FA7226, FA7226T1, FA7236, FA7236SO, and ACC630.