So, I have the original batteries (no switches and no hi/low/flash).

Following on from DezB's group-buy, I was swithering as to whether to buy a new battery with the flash option for commuting. Decided that I can't really justify it but did start thinking – how hard can it be to pop a little in-line strobing circuit inbetween the light and battery?

Beyond my limited electronics design but maybe someone out there might be able to suggest an approach?

Suggestions appreciated…

I'd be interested if something came of this too……

I recently bought one of Ay up's newer batteries with the flashing option, and was a bit underwhlemed by it. The speed at which it flashes is far slower than I was expecting – which IMO makes it less useful as a 'be seen' type light on the road (which is why I bought it in conjunction with some Saxon caps).

The two power levels in the non-flashing mode, also seemed too similar to one another.