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I'm sure this is rudimentary, but I'm very inexperienced in anything practical with electronics. Would like to try to get a 3volt battery go run some LEDs. I thought I could just take two AAA batteries (1.5v each) and wire them in series to get approximately 3v.

So using some tape and solder I ran a (green) wire from the butt terminal of one battery to the head of the other:

I burned myself surprisingly few times in making this

However, when I try to test the voltage, I do not get what I expected

Multimeter shows only 1.63v

I thought hooking batteries together in series should double the voltage? What am I missing?

closed as off-topic by Tester101 Oct 2 '16 at 16:42

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  • Measure each battery individually, you can still do that with the wires you have added attached to the battery. I suspect your batteries don't have a full charge. Your logic is correct. – Tyson Oct 2 '16 at 16:04
  • @Tyson you are correct thank you, one of the batteries seems near 0 – George Mauer Oct 2 '16 at 16:06
  • This is not do-it-yourself home improvement related. – Tester101 Oct 2 '16 at 16:42
  • Soldering to batteries usually isn't good for them. 2AA and 2AAA battery holders are cheap and plentiful on ebay for future projects. – Grant Oct 3 '16 at 21:53
  • Thanks @Grant I was just playing around with this, but thanks for the advice. – George Mauer Oct 3 '16 at 23:04
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Measure each battery individually, you can still do that with the wires you have added attached to the battery. I suspect your batteries don't have a full charge. Your logic is correct.

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