Back-up batteries producer China Shoto surged more than 50% Wednesday morning after it announced plans to buy back shares at 380p each and delist from AIM.Following the cancellation of the company's listing on AIM the directors will consider various strategic options which may include a listing on the Hong Kong Stock Exchange, the Shanghai Stock Exchange or any other stock exchange, though they are giving no guarantees that the shares will be relisted.In a separate announcement, the company a fall in profit before tax in 2010 to £15.29m from £23.46m in 2009, on turnover that fell to £196.9m from £212.6m.The company has proposed a final dividend of 5p which shareholders will get to keep even if they sell their shares via the tender offer.---jh