Progo Dual Battery Charger for GoPro HERO4 and GoPro AHDBT-401, AHBBP-401 Progo mini rapid charger fully charges 1 or 2 batteries for the GoPro HERO 4, HERO4 Black and HERO4 Silver. Repacement for GoPro AHBBP-401, chargers GoPro AHDBT-401. Smart charging LED indicates when charging is complete and prevents battery from overcharging. Includes dual USB charger with USB cord. USB AC Adpater not included. 3 years manufacturer warranty.