20V MAX POWERSTACK 1.7 Ah Lithium-Ion Compact Battery - DCBP034. 20V MAX POWERSTACK 5 Ah Lithium-Ion Battery - DCBP520. 12V MAX/20V MAX 4 Amp Charger - DCB1104. 50 percent more power in a 25 percent more compact battery. Designed to resist wear-and-tear: Durable, overmolded base provides impact resistance. More efficient: Battery is 50 percent more efficient making it DEWALT's most efficient battery in its class. DCB1104: 2-stage LED state of charge indicator. DCB1104: DCB1104 4A charger is 15 p