Rechargeable Batteries

AAA rechargeable batteries (pronounced “triple A”) is a dry cell-type battery commonly used in portable electronic devices. It is also classified as LR03 (IEC), 24A (ANSI/NEDA), R03, RX03, MN2400, AM4, UM4, HP16, or micro. As a AAA battery is composed of a single chamber, it may also be referred to as a cell.

A AAA battery measures 44.5 mm in length and 10.5 mm in diameter. Alkaline AAA batteries weigh around 11.5 gram each, while lithium AAAs weigh about 7.6 g, and rechargeable NiMH AAAs typically weigh 14-15 g. The nominal voltage of alkaline and lithium AAAs is 1.5 V, while that of NiMH or NiCd cells is 1.2 V. The capacity of alkaline AAAs is typically 900 to 1,155 mAh (3240 to 4158 coulombs).

With the rise in portable devices such as laptops, cell phones, MP3 players and cordless power tools, the need for rechargeable batteries has grown substantially in recent years. The concept of the rechargeable battery has been around since 1859, when French physicist Gaston Plante invented the lead acid cell, which would later become the world’s first rechargeable battery. That same chemistry is still used in today’s car battery.

AAA batteries are used primarily in devices that require the same voltage, but have a higher current draw, are often designed to use larger batteries such as the AA battery type. AA batteries have about three times the capacity of AAA batteries. However, with the increasing efficiency and miniaturization of modern electronics, many devices which previously were designed for AA batteries remote controls, computer mice, and keyboards are being replaced by models that accept AAA cells. AAA rechargeable batteries are a great way to save money and reduce waste.

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We’ve all been there before. You’re right in the middle of an action packed part of a game, where every move you make is crucial, and then you get a pop up message from your Xbox 360 saying “Please reconnect controller”. That’s right, your batteries have died, again.

I like the way that the Xbox 360 controller has replaceable AA batteries (as compared to the PS3 controller, which requires you to plug the controller in when the battery becomes completely drained), but finding the right set of rechargeable batteries can be an exercise in frustration. I’ve been through most of them, and have finally found the perfect set. I present to you, the Sanyo Eneloop rechargeable battery.

Most NiMH rechargeable batteries simply use two metals strips, the latter being a negative cathode, wrapped in plastic foil to hold their charge. The Eneloop’s breakthrough technology replaces that negative cathode with a new superlattice alloy. This alloy has the advantages reducing resistance and increasing electrical capacity. But most importantly, it reduces the self-discharge of the battery, which is the life-blood of rechargeable batteries.

Enough techno mumbo-jumbo, what does that all actually mean? Well, for me, it meant longer charge cycles and a higher number of charges. I’ve been using these batteries for months now and I still get as much time out of each charge as I did with my first charge. Also, I’ve noticed that I can play Xbox for much longer on each single charge than with any of the other rechargeable batteries I have tried.

One thing to note is that your xbox 360 dashboard will read these batteries as having three out of four bars even when they’re fully charged. Don’t panic, your brand new batteries aren’t dysfunctional, the xbox 360 just lacks the ability to accurately read Sanyo’s new technology. Rest assured, those batteries will last you many hours.


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