Notebook Hardware and Upgrade Questions

I purchased two HP Envy 15 laptops - a pretty big purchase - 2 years ago. Now, both laptops are bulging from underneath the trackpad and keyboard. HP issued a recall on a large amount of laptops, and has expanded the number of laptops they are accepting for the recall, but unfortunately, they have not included my specific model.

Is there anything I can do, besides purchasing new laptops, that can help with my issue? I have already called HP support regarding the recall and filed a report with the CSPC. So far, the answer has been stop using the computer and pay an HP Service Provider to look at the laptop and determine whether it is worth repairing. The diagnostic alone (no repairs) costs more than a cheap laptop.

Please tell me there is something that can be done. I know that this is a big issue with people who have the same laptop. Even the support agent said that it's a big issue. I recorded the phone call, among many others:

          Recall support agent: "Do you happen to leave the power cord plugged into the laptop all of the time?"

          Me: "Sometimes I leave it plugged in, but, I mean, it's a laptop."

          Recall support agent: "because that's a very common reason why the batteries swell up."

Is that it? Is there any other solution than replacing the internal battery every year?

Thank you,

Tyler