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Student, Programmer (Project Leader)
 · MontréalCanada
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Using 9v batteries as AAA supply

As some of you might know, 9v batteries are one of the few “real” batteries on the consumer market, most others being single cells. By that I mean that they are made of several cells. In this case, 9v square batteries are made of 6 AAA cells in series to sum up their 9v rating. They are also fairly easy to open but I wouldn’t recommand doing it if you’re not confident with a sharp tool in your hands.

Just now, for the sake of seeing how Energizer makes theirs, I opened a very old Energizer 9v battery to get the AAA cells out. I cut my finger a little bit on the process because of how tin the outer shell of the battery is but nothing to worry about. As I said however, they requiere some skills with a blade to open because if you damage any of the cells inside… well… let’s just say I wouldn’t want to see what would happen.

So once again, I will repeat it again and again, don’t try to do this if you’re not confident doing it! You can harm yourself or destroy the cells, which can be even more dangerous if the chemicals are spilled out.

With all that said, I did manage to open it and it contained 6 unsoldered AAA cells. This is very nice because most other 9v batteries usually have the AAA cells soldered to one an other, meaning much harder process of dissassembly. Since it costs much less to buy 1 9v than it is to buy 6 AAA cells, I will probably try to find an alternative in that way to save a bit of money.

note: I will dispose of the cells correctly once I’m done with them, so don’t worry about that.

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Student, Programmer (Project Leader)
 · MontréalCanada
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I tested all 6 cells and only one still have some power in it. 1.5v alone won’t take me far, will have to find or buy new ones.

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