March 20, 2014
This grip is essential for four thirds glass and pretty valuable for doing portrait work. I use it constantly. But leave it attached to the body and it will drain both the grip and body battery within a day or so. Leave it off and the body battery will last for much longer. There is no off switch that will stop or limit this behavior. Somehow in the rush to get a great camera out, this helpful accessory was botched.
November 08, 2013
I bought the battery grip immediately since I have quite a few 4/3 lenses; it helps balance out the camera when using them. It's also a big help when using the intervalometer mode on the camera by supplying extra power when shooting hundreds of still photos. Definitely worth the $200!