Why rechargable, just curious.
i would go with a surefire for brightness, but there are a bunch of others that make good lights for a lot less now.
don't know if they are still around by check out First Light. They have some interesting lights that are very practical. REally cool stuff
Many LED lights designed for 123A Lithium batteries cannot use rechargeable Lithiums because the voltage is too high. You can damage the LED driver using them. The light has to be designed for 3.7 volt lithiums.
Surefire, Streamlight and Insight Tech are the only three I'd even bother to look at and not rechargeable
You can go the Chinese made route with 4Sevens or Fenix. I prefer not to,