AA battery can not fit in the AAA battery slot and, AAA battery can not fit in the AA battery slot. The battery slot in the device can accommodate a specific size of battery. The dimensions of AA and AAA battery are shown in the below pic. Why does the size of the battery matter? The simple reason is that every device has a specific dimension for the fitment of the battery in its battery slot. AA batteries are larger in size as compared to AAA. The letter AA and AAAA do not stand any meaning, it is basically a way of expressing the dimension and nominal voltage. The main difference between AA and AAA batteries is the difference in size or dimensions and charge storage capacity. AA and AAA batteries are widely used in small electronic equipment. And while $1 each may seem reasonable, costs mount up with each single use.In this article, we will discuss the difference between AA & AAA battery. While single-use batteries are convenient, they are exactly that: Use them one time dispose of them. Thus we conclude three weeks of rechargeable battery columns. There's more profit in selling single-use batteries than in selling plastic sleeves for rechargeables at $1 or $1.50 each. The point is, I've never seen these spacers for rechargeable batteries sold in brick-and-mortar stores. It's even possible to find adapter spacers that will convert AAA rechargeables into a C or D battery size. (Yes, it's cheaper to buy the two aforementioned offers than it is the combined one.) For some of each, there is a package deal: Four C adapters and four D adapters for $20. There are also six D-size sleeves offered for $8. A set of 10 C-size ones are sold on Amazon for $10. The AA battery is inserted into the sleeve, which comes with a filler to hold the smaller battery in place in its new, oversize slot in the electronic gadget. Think of the spacers as a sumo-wrestling costume that makes the wearer look more like a helium balloon than a person. The spacers come in two sizes to make a AA into a C- or D-cell battery. The run time will be reduced, but the cost of replacing a single-use battery won't be there.
The flashlight or whatever will still be as bright or work as well. How does that work? There are "spacers" available for AA batteries: Simply put the AA in the spacer - which come in sizes for C- and D-cell batteries - and insert them into whatever electronics the C- or D-cells were powering. The answer to the flashlight riddle, then, is this: The larger batteries that once ran the flashlight have been replaced with smaller AA batteries.
These batteries are so expensive that one website selling them offers: "Pay in four interest-free installments for orders over $50.00." (Other brands are available for about $15 for two - but they'll need a D-cell charger, which adds to the cost.) And they are expensive: a two-pack of D batteries that recharge using a built-in USB port is $30 online. Finding C- and D-cell rechargeables is far more difficult. And there are good ones that match the performance of national brands, but without the price tag. Rechargeable AA and AAA batteries are common. When I started the change-over from using alkaline batteries - which are sometimes prone to leak and thereby corrode the electronics they power - for rechargeable ones (which are far more economical and rarely leak), I didn't know the answer to that riddle either. Riddle me this: I have a flashlight that uses D-cell batteries.
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