Per Leaford in the LED on V4L
batteries is amazing (or something like that title!):
It varies with the battery color. Black and white come in green and blue, Chrome and Blue have green LEDs, Green, Platinum and Pink have blue LEDs. It also varies a bit from order to order as we tinker with the selection.
On the shorties, Black has blue, Pink comes in blue and yellow, Blue has blue or orange, Yellow has yellow, red, or green, and Green and White batts have green LEDs.
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