OK, so I'm a little embarrassed to post this, especially after the references to Snap-On, Dewalt, and other higher quality tools. I don't have a lot of Snap-on tools, but do have several from Dewalt, Makita, Ingersoll-Rand, and others. I'm more than willing for spend $ for high quality tools when needed, but sometimes something a little closer to "disposable" fills the bill more than adequately. Were I a pro using it every day like Walt others, I may well go a different direction.
I have a couple of these little 4v screwdrivers from that oh-so-well-known tool company "Hyper Tough", sold at Walmart. Not precision, but they work great, and at less than $18 (I think they were less than $15 when I bought them 3 years or so ago), they're tough to beat for removing about a million machine screws at CI time, or any number of other relatively light duty jobs. Still going strong after 3 years, so if one failed tomorrow (and there's no sign of that), I'd be out less than a gallon of Avgas/year.
The handle swivels, to either be straight or L-shaped, which can help in tight spaces. A small LED lets you see what you're doing in dark spaces. More than enough power for removing/driving machine screws; setting the clutch at 3 prevents stripping out the screw head, but there's more torque if needed. Depending on the location, I'll occasionally follow up with a hand screwdriver to ensure "German Torque". Charge seems to last a reasonably long time--I've never needed a recharge for a single job--even opening up everything on the -10 for the CI. Cheap enough to keep an extra in the travel tool bag. Not sure about the quality of the included bits--I don't use them.
https://www.walmart.com/ip/Hyper-To...BCBpdKdNVQuzYuAQnjJ&athancid=null&athena=true