This is the Spektrum S150 AC/DC Smart Charger, 1x50W.

With the compact S150 AC Mini Smart Charger, modelers of all experience levels can enjoy the charging advantages of innovative Spektrum™ Smart technology. This 50 watt charger brings advanced Smart charging capabilities and features to an affordable platform that features an easy-to-use, one-button interface.

When used with Spektrum Smart batteries with an IC3™ or IC5™ connector, the S150 uploads charging data from each battery's integrated memory chip. That pack-specific data helps you evaluate battery health and makes charging a snap — because the S150 can read and make the correct chemistry setting automatically. The S150 AC Mini Smart Charger is compatible with LiPo, Lilon, LiHV, and NiMH battery types.