Leaving the Horse and Buggy Days

I trim hedges with what looks like a big pair of sizzors. My wife wants to do this, with hedge trimmers and leans toward the battery powered trimmers.

I think this is a wonderful opportunity for me to shed a responsibility and gain a helper, but I'm clueless on the best models.

Any suggestions? Remember: foolproof, safe, long charge life and lightweight with an affordable price. Don't suggest some commercial product that weighs too much and has a battery that will start a dozer. While I may lean towards such a thing, my wife doesn't think that way and I damn sure don't need to piss off my partner.