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Why are Energizer "D" batteries so weak? To find out the answer, I decided to take one apart and see what was inside. As this picture reveals, inside the "D" battery is a much smaller battery! The Energizer "D" battery is actually just a cheap plastic shell surrounding a much smaller, low-capacity battery similar in size and capacity to an "AA" battery (2500 mAh).
This explains why the Energizer "D" rechargeable battery has such low power capacity to begin with. The company doesn't even try to make it a high-capacity "D" battery, it seems. They're filling part of the inside of the battery body with nothing more than cheap plastic and useless air. And how much does Energizer charge for this "D" battery? More than $12 each!
This explains why the Energizer "D" rechargeable battery has such low power capacity to begin with. The company doesn't even try to make it a high-capacity "D" battery, it seems. They're filling part of the inside of the battery body with nothing more than cheap plastic and useless air. And how much does Energizer charge for this "D" battery? More than $12 each!
It's true: These inferior "D" batteries cost around $25 for a pack of two. These are known as "Energizer E2 Rechargeable Batteries, Size D," rated at 2500 mAh each. (mAh is a measure of how much power is contained in the battery. It's sort of like the fuel tank in your car. The bigger the number, the more power the battery delivers.)
By comparison, an Energizer AA battery rated at the exact same capacity -- 2500 mAh -- costs about THREE dollars!
So why is a "D" battery priced at 400% more than an AA battery with the exact same capacity? Because Energizer can get away with it, probably. Most consumers have no idea about the mAh numbers. They just look at the physical size of the battery and figure it has more capacity. (Mainstream consumers are remarkably gullible, and few understand any technical specs at all.)
By comparison, check out the Powerex "D" rechargeable batteries at BetterLifeGoods.com. These batteries have more than 300% more power than the Energizer batteries, and they only cost slightly more! ($15 dollars vs. about $12, for triple the power). They're also significantly heavier. And you know why they're heavier? Because they don't contain a bunch of cheap plastic and air gaps inside!
ok i just red the hole energiser usb charger trogin thing
and after reading this i have NO trust for them. and wats wercs is juat a few days ago i was raving how good they are