Lumintop should have some batteries they will offer for sale with the light to save on shipping although the type and cost has not been released yet.
For the charger, there are a lot of good options. You do not need an 8 cell charger, you can use a 4 cell charger as well and do them in 2 batches.
Also the light will work perfectly fine with 4 cells, you will just get half the runtime naturally.
For the cells themselves, I prefer the higher capacity cells like the Sanyo / Panasonic GA or the Samsung 35E. Although if you find a good deal on somethign else, pretty much anything from the major brands will work fine.
The good brands being:
Samsung
LG
Sony
Sanyo / Panasonic
There are some other brands like Efest and keeppower ect that are a bit more hit and miss but should work as well.
