I recently acquired a PVS-2 Starlight Scope to fit my L1A1. It came with a harness taking four AA torch batteries that fits into the scope's battery housing. I attach a photo.

This appears to work reasonably well but is naturally only 6 volts whereas the original PVS-2 battery was nearer 7 volts.

To my way of thinking it would not be difficult to manufacture a suitably sized shell the size of the original battery containing three 3 volt lithium camera batteries giving 9 volts. This voltage could be reduced by internal diodes to just under 7 volts.

has anybody views on such a set-up? Would this give even better results than
I am presently getting?
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