Duracell Plus Power 9V Batteries (6LR61) - 2 Pack

This is a pair of 9V alkaline batteries from Duracell's Plus Power range, carded together as one pack of two. The 9V is the tall rectangular block with two snap terminals on top, and it is the one common size that connects by clip rather than by sprung contact. The pack and the cells carry the codes 6LR61 and MN1604, which are the international and the manufacturer references for the same battery, so if either appears on the old cell or in an appliance manual, this is the right replacement.

Nine volt cells do a narrow set of jobs very well. Smoke and heat alarms are the main one, either running entirely on a single cell or holding one as the backup behind a mains supply. Beyond that they turn up in digital multimeters, radio microphones and beltpacks, guitar effects pedals and active pickups, doorbell transmitters and small keyboards. Because the terminals clip on rather than sit in a tray, a 9V is quick to swap by torchlight at the top of a ladder, which is usually when you need to.

You receive two cells on one card. The minimum order on this listing is 10 units, sold in multiples of 10, so the smallest order brings 20 batteries in total, which suits a building's worth of alarms or a stocked stage rig. The retail pack carries a 100% life guaranteed claim, marked with an asterisk pointing to the manufacturer's own terms, and prints no shelf life figure. Keep spare cells in their card until they are needed, since a 9V has both terminals exposed on the same face. This listing sits alongside our wider Duracell range, which also includes lithium coin cells such as CR2032 and CR2016, silver oxide cells and LR44 alkaline cells.

Will these fit my smoke alarm?

If the alarm takes a 9V block battery with two snap terminals, yes. Check the compartment or the manual for 9V, 6LR61 or MN1604, which all name this cell.

What is the difference between 9V, 6LR61 and MN1604?

Nothing at all. 9V is the everyday name, 6LR61 is the international alkaline designation and MN1604 is the manufacturer's own reference for the same battery.

How many batteries do I actually receive?

Each listing unit is one card holding two batteries. The minimum order is 10 units sold in multiples of 10, so a smallest order gives you 20 cells.

Can these be recharged?

No. These are alkaline primary cells, which are designed to be used once and then recycled. A rechargeable 9V would be a NiMH cell instead.

Does the pack print a shelf life or storage date?

The manufacturer does not print a shelf life figure on this pack. The pack carries only a 100% life guaranteed claim with an asterisk pointing to its own terms.

How long will one cell run my guitar pedal or multimeter?

The manufacturer does not state a runtime, and it varies enormously by device. A multimeter may last months of intermittent use where a high drain pedal will not.