30w esp not working

I need help ive had this battery for about 3 weeks went to take a hit when I got off work took one then battery says check atomizer I have a triton had .4 ohm coil in it swaped out to the 1.8 still says check atomizer but tried on other battery worked fine I cleaned battery didn't look dirty and its fully charged I don't understand why it won't work any tips or help would be awesome thanks
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