The first hack that I am going to present is the classic 9 volt battery hack. This hack has been done over and over again. But I am going to try to be a little more thorough and present some new information.
First, let’s start with a little background information. There are two main styles of construction for 9 volt batteries. The first and most popular style is made up of 6 AAAA batteries. Batteries in this style include Duracell, Energizer, DieHard, RadioShack and many more. An example of this is shown on the right side of the picture below. The second main construction style is a stack of short fat rectangular cells in a clear plastic case. The middle battery in the picture below is a typical Rayovac 9 volt and the battery on the left is typical of EverReady, as well as many generic brands. Unfortunately, this style of battery is difficult to safely disassemble. So I am just going to talk about how to hack the first style constructed from AAAA’s.
To open a 9V battery, Find the seam in the metal case and pry up the edge with a screwdriver. Then take a pair of needle nose pliers and peel away the metal. You should just be able to roll up the metal like a sardine can. Then pull off the connector cap to reveal your 6 AAAA batteries. They should just come right out. The only exception is Duracell who wraps their batteries in an extra layer of plastic and connects the batteries directly together with small metal strips. This can be really useful if you want to make a freeform battery pack but not if you just want some AAAA’s. In my opinion, the best brand for extracting AAAA's is Energizer.
AAAA’s are mostly useful for making miniature battery packs or substituting for AAA’s in an emergency. You can do this kind of substitution with any size battery. You just need to find a way to fill in the gaps. You can use coins, nuts, washers or just scrap metal to bridge the electrical connection. To ensure that they fit in the battery slot, the easiest thing to do is wrap them in a few layers of tape. Just keep in mind that they won’t last nearly as long as the larger battery.
First, let’s start with a little background information. There are two main styles of construction for 9 volt batteries. The first and most popular style is made up of 6 AAAA batteries. Batteries in this style include Duracell, Energizer, DieHard, RadioShack and many more. An example of this is shown on the right side of the picture below. The second main construction style is a stack of short fat rectangular cells in a clear plastic case. The middle battery in the picture below is a typical Rayovac 9 volt and the battery on the left is typical of EverReady, as well as many generic brands. Unfortunately, this style of battery is difficult to safely disassemble. So I am just going to talk about how to hack the first style constructed from AAAA’s.
To open a 9V battery, Find the seam in the metal case and pry up the edge with a screwdriver. Then take a pair of needle nose pliers and peel away the metal. You should just be able to roll up the metal like a sardine can. Then pull off the connector cap to reveal your 6 AAAA batteries. They should just come right out. The only exception is Duracell who wraps their batteries in an extra layer of plastic and connects the batteries directly together with small metal strips. This can be really useful if you want to make a freeform battery pack but not if you just want some AAAA’s. In my opinion, the best brand for extracting AAAA's is Energizer.
AAAA’s are mostly useful for making miniature battery packs or substituting for AAA’s in an emergency. You can do this kind of substitution with any size battery. You just need to find a way to fill in the gaps. You can use coins, nuts, washers or just scrap metal to bridge the electrical connection. To ensure that they fit in the battery slot, the easiest thing to do is wrap them in a few layers of tape. Just keep in mind that they won’t last nearly as long as the larger battery.
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