The Phillips Saferide (all versions) uses nimh AA batteries. You cannot put rechargeable lith-ion batteries into AA lights, the voltage is different.

Here's the page of the guy who write all about the light - and sells the v2 version from Europe -
http://swhs.home.xs4all.nl/fiets/tes.../index_en.html

You can look at the bottom of the page under this heading:
New: Experiences with version 2 with the mount with ballhead and warmer LED light colour and again changed electronics

Specifically this part:
It seems Philips took almost all comments from me and others to heart (except using LiIon batteries, and it still can't be used while charging), and the result is fantastic. It's way better than any other bike headlamp... (for non-MTB use)

rekmeyata is either just trolling the thread or very very confused.

I ordered one of them myself from the European distributor, I'll what they say about battery life when it gets here.

This was the last comment I saw on the runtimes of the v2 version -