The Canon BG-E14 Battery Grip  for the EOS 70D 80D 90D DSLR cameras holds up to (2) LP-E6 battery packs simultaneously to effectively double your shooting power, plus the grip includes a holder to use (6) AA batteries. 

In addition, the grip provides full vertical shooting controls, which can be independently turned on or off as the photographer needs to enhance camera handling, especially for shooting vertical pictures.