The Bosch PS10-2 I-Driver is a cordless screwdriver powered by a 10.8 V Litheon battery with a 5-position articulating head. The next generation Litheon battery provides a longer battery life, more charges in its lifetime, in a small package. Bosch claims that this tool can drive 100 3" screws on a single charge.
The PS10-2 I-Driver's 5-position articulating head can be positioned at 90 degrees for accessing tight spaces. It is made from durable plastic with a comfort grip, albeit a slightly fat barrel that can be cumbersome for smaller hands. This driver has a variable speed control using the trigger that limits the torque electronically, removing the need for a bulky mechanical clutch.
The PS10-2 includes 2 lithium-ion batteries, 30-minute charger, soft carrying case, and 2 bits. It measures 6" x 6.5" and is covered by a 3.5 year protection. The retail price is set around $149, but you can likely find it online for around $100.