I've been using probably the same General Precision Screwdriver as you for awhile now and it works great for most small screws. There are a few that require a bit of a wrist flick to loosen. I havn't broken it yet but I was lucky to get this PLUS the General Cordless Engraver for $10 for both so not a big deal if it gives out.

For larger screws I either use a Black and Decker 7.2v Lithium Cordless Drill (very lightweight but powerful) OR a Ryobi Tek 4 Cordless Screwdriver (a bit heavier but has light on the chuck, removeable rechargeable battery, and a '2' speed setting for quick removal of loose screws).