Western Journal of Applied Forestry
Using an increment borer to extract many cores can be tedious. The performance of cordless drills has improved greatly, making them an alternative for driving and removing increment bore bits. High torque cordless drills can reduce the time required to extract cores by a third and substantially reduce the effort required.
Baker, F.A. & J.N. Long (2003). Using a cordless drill to extract increment cores. Western Journal of Applied Forestry 18(1): 29.