DeWalt DCB205 20V MAX 5.0Ah Battery vs DeWalt DCB2108 20V MAX XR 8 Ah Battery

The DCB2108 is the stronger battery: 8 Ah versus 5 Ah, tabless cells, and an overmolded base that shrugs off drops. It is also heavier at 2.2 lb against 1.4 lb, and it charges in about an hour versus roughly 30 minutes for the DCB205. Buy the DCB205 if you want a lighter pack that keeps a drill or impact driver balanced and tops up fast; buy the DCB2108 if you run blowers, trimmers, saws or other high-drain tools and want to finish the job on one pack. Owners of the 5 Ah praise its runtime and fast charging but call it bulky in case stacks; the 8 Ah POWERPACK line is DeWalt's top-performing 20V MAX line, and its rating sample is much smaller.

• Choose the DCB205 if you want a lighter 5 Ah pack that charges in about half an hour and keeps compact drills and drivers balanced.
• Choose the DCB2108 if you run high-drain tools like blowers, trimmers and saws and want maximum runtime per charge with tougher cell and base construction.