I have some cordless phones that have served our household well for a number of years. The original batteries lasted a couple of years before they wouldn't hold much of a charge. I was able to work via the cordless phone via the speakerphone for over an hour before the batteries gave out. Now, a couple of replacement batteries later, I consider it a good day if I can stay on a phone call for, say, 20 minutes and that's using a battery that's only a couple of months old. It almost makes me wonder if they're not selling used batteries. With the replacement batteries costing $15+, it's not likely that we're going to do it any more. The missus is the last major user of the cordless phones and she's switching to mobile next month. The crappy battery life is one of the reasons she's switching.
I have worries that I'll run into the same battery rip-off with my laptop. And those batteries run upwards of $100. Given the track record of the supposedly equivalent batteries we've been finding for our phones, I'll probably go with an original manufacturer battery for the laptop.That's probably no guarantee but I'm guessing they won't be as bad as the third-party batteries.