They are the ones I have, but any replacement pack should work. https://www.amazon.com/dp/B08N4JSB9C/ref=cm_sw_r_apan_glt_i_ZA13XGGF5J7ERM0540CR
Here's one link. There are all kinds though. =) https://www.amazon.com/dp/B08N4JSB9C/ref=cm_sw_r_apan_glt_i_ZA13XGGF5J7ERM0540CR