Not sure what "indent" represents. However, the negative (-) end is flat with no protrusions, and forms the side of the battery as well. The positive (+) usually will have a protrusion (button) which is electrically isolated form the bottom/sides.
If you have a volt meter, you can touch both the top and bottom and observe polarity. If the red lead is on the positive, the VM will display a +V, if reversed you will see -V.
Joe Parsons wrote:
I'm making up a flight pack of 4 new NiMH 2/3 AAA cells.
The polarity is not marked on the cells, but there's an indent at one end.
Is that the positive?
Joe Parsons
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