Norwegian energy and aluminium company Norsk Hydro ASA (<a href="https://live.euronext.com/en/product/equities/NO0005052605-XOSL" target="_blank">OSE:NHY</a>) announced on Monday a deal to acquire the remaining stake in battery recycling joint venture Hydrovolt from its struggling partner, Swedish battery developer Northvolt AB, for NOK 78 million (USD 6.84m/EUR 6.63m).