Dewalt 20v max battery packs and charger review

An honest unbiased review of Dewalts 20v max cordless tool battery packs and charger after 4 years use from a diyer/handyman. This is part 1 of a 6 part review of all my Dewalt tools. Part 1: 20v max compact drill driver Part 2: 20v max impact driver Part 4: 20v max cutoff wheel/grinder Part 5: 20v max reciprocating saw Part 6: 20v max batteries and charger