CR927. This Eunicell CR927 3V lithium button cell battery has a nominal capacity of 30mAh and is supplied in a pack of five. Coin cell batteries are commonly used in precision engineering tools and automotive remote key fobs as well as many other applications. . 3V lithium button cell battery. Nominal capacity: 30 mAh. Size: 9mm x 2.7mm. Also replaces: DL927, ECR927, BR927, DL927B, BR927-1W, CR927-1W, KCR927 & LM927