These Duracell Plus 9V 6LR61 alkaline batteries come in packs of 2. They are slightly better priced than the single batteries. Get long lasting reliable power from these Duracell Plus 9V 6LR61 alkaline batteries. The new Duracell Plus batteries are now manufactured to 6LR61 specification. In other words they contain 6 x LR61 cylindrical cells inside the oblong outer casing. Ideal for all 9V applications including smoke alarms and medical equipment. 10 packs of 2 per box. Replaces 9V 6LR61 MN1604 E-BLOCK 4022 6LF22 1604A PP3.