电池板块12月17日涨2.49%，天华新能领涨，主力资金净流入21.28亿元

Core Points - The battery sector increased by 2.49% compared to the previous trading day, with Tianhua New Energy leading the gains [1] - The Shanghai Composite Index closed at 3870.28, up 1.19%, while the Shenzhen Component Index closed at 13224.51, up 2.4% [1] Fund Flow Analysis - The battery sector saw a net inflow of 2.128 billion yuan from main funds, while retail funds experienced a net outflow of 1.053 billion yuan and 1.074 billion yuan respectively [2]