The Optimum line features “extra life” and “extra power,” enabling a flashlight to shine brighter and longer. Optimum's enhanced performance is driven by a new proprietary cathode system that outperforms even Coppertop. The technology is one of the biggest innovations for alkaline batteries in the past 50 years.

Duracell Optimum nominal battery voltage (ie the approximate voltage value used to identify the battery type) is the same as the nominal voltage of other Duracell alkaline batteries (1.5V), yet, Duracell Optimum has an additional active secret ingredient to its cathode on top of its alkaline chemistry, allow to deliver ...

Duracell Optimum: Best Alkalines for high-drain devices The Optimum is even better, with 1.35V after 30 minutes and 1.26V after an hour, where the Ultra Power cells were starting to run low. Even after three hours there was still over 1.2W in each battery; only the lithium batteries on test last longer.

From the manufacturer. *Duracell Optimum batteries have a proprietary cathode system that can deliver Extra Power in some devices, or Extra Life in other devices, across a wide range of devices vs. Duracell Coppertop AA/AAA batteries.

The battery life in these two brands differs. Energizer lasts three times longer in clocks than the Duracell, but Duracell takes the crown by lasting two times longer when used in flashlights. To ensure that our environment is not harmed, both brands support the Call2Recycle program.

On top of premium alkaline chemistry, a new cathode system allows these 1.5V batteries to provide up to 200% extra life in your device, whilst having the ability to deliver extra power to motorised gadgets. This is all down to the batteries having a higher running voltage when compared to alternatives.

Duracell Ultra is our Number 1 longest lasting battery for all devices.

Duracell Ultra AAA Batteries Duracell Ultra AAA Batteries are Duracell's most powerful battery and the longest lasting alkaline battery available.

In an application like that, they could expect to see an OPTIMA battery last four to six years. However, in a more moderate climate, like San Diego, if someone might see four years out of a flooded battery, they could see double or triple that out of an OPTIMA.

“Why are Duracell batteries so expensive?” Because people buy their batteries at this price. Because the batteries are perceived good enough to justify this price. Yes there might be high-tech and a lot of RND effort in those batteries, but eventually it boils down to market, whether people buy it or not.

Specifically, the complaint alleges that Duracell and Proctor & Gamble violated certain State consumer protection laws and engaged in deceptive conduct and/or false advertising by misleading consumers about the benefits of the battery life for these premium-priced batteries and claiming that these batteries lasted “Up ...

I find Duracell batteries are always reliable. Replacing cheaper batteries as they give out.