Battery size: MN21/ A23. Type: Alkaline. Expiration date: 11/2024. Other designations: 23A, 23GA, A23, E23A, GP-23A, GP23A, K23A, L1028, LR23A, LRV08, LRVO8, MN21, MS21, V23, V23GA, VR22. Weight (of one battery): 9.4 g (0.02 lbs).
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