... Normally Closed or Normally Open Operating Temperature: 30~155°C Super low internal resistance: Lower than 25 milliohm Miniature ... They are widely used for overheat protection of Li-ion batteries, battery packs, power banks and Li-ion battery protection board, LED power driver, etc. ... located in Youxian County Hunan Province to specialize in R&D, production and sales of thermal protectors and thermal ...