@KIRCHAN
There are MANY models/products called HP OMEN Laptop 17-an0xx machines. They may not use SAME battery. I use the following machine to reply your question, hope they use same part for battery.
https://support.hp.com/us-en/product/omen-by-hp-17-an000-laptop-pc/15551440/model/17106304/document/...
It uses 8-cell, 82 Wh Li-ion battery part # 922977-855 which is N/A from HP Part Store. Please use part # to search elsewhere such as Amazon, eBay ...
Regards.
BH***
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