China’s energy storage firms, battered by a three-year price war, have been jolted by lithium battery maker Deegares, which has announced plans to raise prices by 15 per cent, a move that is sparking debate over whether the sector could be the first to break free from the “involution” cycle. Rising lithium costs were the immediate trigger, with at least three other battery makers reported in recent weeks to be planning similar increases. Prices of the metal, crucial to rechargeable batteries,...