The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
No...if you read through the battery guide you'll get more info, but the bottom line is that the specs, materials, or quality could be just different enough to cause problems.
Is it a "generic" battery or a bonafide HP-stamped battery? Many outlets on the internet are selling both, like Ebay. You don't have to neccessarily buy the battery from HP for it to be an HP-approved battery.
Just like the power adapters, the batteries are sourced from other than HP anyway from a dozen manufacturers. The difference is, the one with the HP stamp has been built to their tolerances. The same can't be said of the "generic".
I would not recommend that. As you may have seen in the past few months there have been cases of exploding laptop batteries. HP has fortunately not had this problem so they are doing something right with their batteries. If you use a Non-HP battery and have a problem your warranty will not cover it. You might save a few bucks upfront getting a Non-HP battery but I think it would cause you more grief and could even be dangerous so go ahead and bite the bullet and get the official HP battery.
Problems? See this thread at archive.org.
