SEOUL, March 1 (Reuters) - South Korea tightened rules on carrying lithium batteries on planes from Saturday, highlighting a growing risk to flights worldwide from the batteries used in cellphones and e-cigarettes which can malfunction to produce smoke, fire or extreme heat. Last year three incidents a fortnight of overheating lithium batteries on planes were recorded globally by the U.S....

BEIJING (Reuters) - Chinese AI startup DeepSeek on Saturday disclosed some cost and revenue data related to its hit V3 and R1 models, claiming a theoretical cost-profit ratio of up to 545% per day, though it cautioned that actual revenue would be significantly lower.     This marks the first time the Hangzhou-based company has revealed any information about its profit margins...

(Removes extraneous word 'the' in paragraph 2) (Reuters) -India's Paytm received a show cause notice from India's financial crime fighting agency on Saturday for allegedly violating the country's Foreign Exchange Management Act. The notice relates to violations relating to the acquisition of two subsidiaries - Little Internet Private Limited and Nearbuy India Private Limited for the years 2015 to 2019,...

BEIJING, March 1 (Reuters) - Chinese AI startup DeepSeek on Saturday disclosed some cost and revenue data related to its hit V3 and R1 models, claiming a theoretical cost-profit ratio of up to 545% per day, though it cautioned that actual revenue would be significantly lower. This marks the first time the Hangzhou-based company has revealed any information about its...