IMHO, a battery grip for a D80 is only very useful for taking portraits-wise photography.
If you already like the D80's feel in your hands w/o the additional grip, spend the money elsewhere, it is not dat necessary. The battery life of D80 is VERY good, I'm able to take 600++shots with a 70-200VR whilst the battery level only dropped 30%...
If you die die need more battery power, get a 3rd party ENL3e from company like Eastgear.
If you already like the D80's feel in your hands w/o the additional grip, spend the money elsewhere, it is not dat necessary. The battery life of D80 is VERY good, I'm able to take 600++shots with a 70-200VR whilst the battery level only dropped 30%...
If you die die need more battery power, get a 3rd party ENL3e from company like Eastgear.