I've been using these Energizer Max D batteries in my gas fireplace logs, and they've been a game-changer. Unlike the generic ones I tried before (which died within days), these have kept my fireplace running smoothly through weeks of daily use during freezing weather. No more midnight battery swaps!

What surprised me is their versatility - they're not just for toys anymore. I tested them in my hurricane prep gear too. The fuel transfer pump for my generator worked flawlessly with these, and knowing they'll hold charge for years in storage gives me peace of mind during storm season.

The Powerseal Technology really shows. My neighbor's off-brand batteries leaked in his flashlight, but mine stayed clean after months in emergency kits. Though the packaging could be sturdier (mine arrived in a simple envelope), the batteries themselves arrived with expiration dates years out.

Pro tip: They work great in vintage boom boxes too - gave my old stereo new life at our backyard BBQs. At this price point for 8 quality batteries, I'm converting all my D-cell devices to Energizer.