English: Photo illustrating the A27 battery size (also known as 27A, GP27A, MN27, L828, 8LR732, 22). This is a battery with 12 V nominal voltage, so internally has 8 cells.
Shows from left to right:
a disassembled infrared remote control from adjustable brightness home led lighting that uses an A27 battery,
two A27 size batteries (left one is probably mercury, right one is alkaline),
an A23 size battery for comparison (alkaline, A27 is easy to confuse with the more common A23 size because it's the same length and voltage),
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