Laptop Battery replacements ?

Yes - a lot of the generics are equally as good, providing you buy from a relatively proven source (as in, not some love-you-long time Chinese site); the risk with generic batteries is that they might not have charge/over-current protection, which then makes them lethal. However, what most people don't realise is that regardless of the shape of the battery, it actually contains a number of 18650 cells, and it is likely that they each have the relevant circuitry.

You could Dremel your current battery open and replace all of the cells, but by the time you have bought half a dozen 18650 cells, you would be as cheap (and easier) going for something like this DTK one

I used a DTK batter for my HP laptop many years ago, and it lasted fine; more recently, I bought one of their camera batteries for our 'old' camera, and again it has proved to be just fine.

 

As with all electronics, there is always the risk of a DOA - with these it is almost certainly going to be a poor connection internally which causes the early failure. Amazon won't muck you about though - if it is faulty, they will take your case up in the event that there is any nonsense with the seller.

Also, don't forget, that people who have had a failure are significantly more likely to post a review than those who have received the goods and have used them without issue.