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https://www.hytera.com/en/product-new/accessories/batteries/bl1813-ex.html

Use Ex protection design which complies with ib IIC Ex standards, and anti-counterfeiting IC design which is capable of identifying fake batteries during communication.

Specifications of BL1813 Ex
Specifications
Dimensions(H×W×D) mm130.3*56.8*20.2(mm)
Weightabout 178.0g
Nominal Capacity1800mAh
Nominal Voltage7.4V
Operating Temperature0℃ to 45℃(charge) –20℃ to 60℃(discharge)
Storage Temperature–20℃ to 60℃ (for one month) –20℃ to 45℃ (for three months) –20℃ to 25℃ (for one year)
Battery Life Cycle400 times
IP RatingIP67
Anti-explosion levelsFM, ATEX, IECEX, CSA, CQST

Hytera communications corp limited has more than 100 offices worldwide and more than 40% of our workforce is engaged in engineering, research and development. There are 9 global innovation and development centers located in China, Germany, UK, Spain and Canada. The centers collaborate to keep Hytera at the forefront of the communications industry and are dedicated to developing leading technologies into solutions that our customers can count on to meet their real time communications challenges.