Duracell Plus Power 9V PP3 Alkaline Battery - 4 Pack

The Duracell Plus Power 9V PP3 is a 9-volt alkaline battery supplied in a 4-pack, designed for devices requiring long-term standby power or intermittent high-drain use. Each battery carries the 6LR61/MN1604 designation and provides 9V nominal output through Duracell's alkaline chemistry, which balances energy density with shelf life.

These batteries are commonly used in smoke alarms, carbon monoxide detectors, wireless microphones, guitar effects pedals, multimeters, and medical devices such as digital thermometers and blood pressure monitors. The alkaline formulation delivers consistent voltage across the discharge curve, making it suitable for devices that require stable power rather than peak-drain performance. Duracell rates these batteries to operate in temperatures from -20°C to 54°C, covering most residential, commercial and outdoor installation environments.

The Plus Power range includes Duracell's Duralock technology, which helps retain charge during storage — unused batteries maintain up to 80% of their capacity after 5 years on the shelf when stored at room temperature. Each battery also incorporates leak-prevention features in the cathode seal, reducing the risk of electrolyte leakage that can damage device contacts and circuitry. The 4-pack format suits users maintaining multiple smoke alarms or regularly replacing batteries in professional audio and test equipment.

How long do these batteries last in a smoke alarm?

Battery life in smoke alarms varies depending on the alarm's power draw and self-test frequency. Most residential smoke alarms will run for 12-18 months on a Duracell Plus Power 9V before needing replacement. Replace the battery when the low-battery chirp sounds rather than waiting for it to fail completely.

Are these rechargeable?

No. These are single-use alkaline batteries and must not be recharged. Attempting to recharge non-rechargeable alkaline batteries can cause leakage, rupture or fire. For rechargeable 9V options, look for NiMH chemistry batteries rated for recharging.

What's the difference between Plus Power and the standard Duracell Coppertop?

Plus Power batteries use an enhanced alkaline formulation that provides slightly longer runtime in high-drain devices compared to Coppertop. For low-drain applications like smoke alarms the difference is minimal. For guitar pedals, wireless microphones and multimeters the Plus Power chemistry can extend operating time by 10-15%.

What does the 6LR61/MN1604 code mean?

6LR61 is the IEC (International Electrotechnical Commission) designation for a 9V alkaline battery. MN1604 is Duracell's internal product code for the same battery type. Both codes refer to the same physical and electrical specification, so any device calling for 6LR61, MN1604, PP3 or 1604A will accept this battery.