- Are these good for smoke detectors?
- Yes. Coppertop AA is a common choice for smoke alarms and lasts about a year in most models. Check your alarm's manual, since some makers recommend lithium for longer intervals.
- How do they compare with Duracell Optimum?
- Optimum is the step-up line, aimed at high-drain devices and marketed for longer life there. Coppertop is the cheaper everyday option and is fine for remotes, clocks and toys.
- Should I use these or lithium AA?
- Lithium AA lasts longer in cameras, flashes and cold weather and weighs less. Coppertop costs less per cell and is enough for low-drain devices.
- Can these be recharged?
- No. Coppertop is a disposable alkaline cell. Recharging it can leak or rupture; use NiMH rechargeables if you want reusable AA cells.
- What is Power Boost?
- Duracell's name for the ingredient mix in the cell that it says improves performance in high-drain devices. It is still a standard 1.5V alkaline battery.
- How should I store them?
- Keep them in a dry place at room temperature, away from metal objects that could short the terminals. Do not refrigerate them.
- Where is the Duracell Coppertop AA Batteries with Power Boost Ingredients cheapest?
- At Herbspro, for $4.90, as of our latest check.
- Where can I buy the Duracell Coppertop AA Batteries with Power Boost Ingredients?
- 2 stores we checked sell it, including Herbspro, Adorama.