Thrunite TN4A Battery Tube Extender?

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JBS12
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Thrunite TN4A Battery Tube Extender?

Is it possible to get (or make) a battery extender tube for the Thrunite TN4A, in order to turn it from a 4xAA into an 8xAA flashlight? I like the look and specs of the TN4A, but I need a something with longer runtimes (similar to a 2D flashlight).
Thrunite TN4A

scrumpypaul
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Joined: 03/19/2015 - 18:29
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Location: East Durham, UK

I may be stating the obvious but wouldn’t it be easier/cheaper/more compact just to carry a spare set of four charged cells?