So I love my acuvibe mini- it's got a nice strong deep thrum-y vibration - BUT it's only strong for about the first 5 minutes out of the charger. After that it's weaker and doesn't take long at all to drain completely. So I decided I wanted something that plugs in so I wouldn't have to deal with the power dying and ordered the Fairy Mini that came yesterday. While it's strong, it's only AS strong as my acuvibe on its highest setting and the vibrations are more...shallow? They just don't seem to have the same penetrating power of the acuvibe. I also really like the deep thrum-my vibrations of my Wahl but I just don't find any of the attachments functional for me personally (although for actually body massage, it's amazing). So is there anything out there that will have the strength of my acuvibe but without dying on me? I'm really tempted to order the Hitachi but I'm concerned about the size of the head on it and honestly, I don't want to be as disappointed as I was with the Fairy.

Help!!!