Is it safe to buy MacBook Pro batteries on eBay?
Solution 1:
That depends on the product. I have gotten both good and bad batteries on eBay.
If it comes from China, Japan, Korea, or any other Asian country, it may very well be a fake. I have ordered several from those countries, and most of them ended up not even being detected by my MacBook.
Filter the listing so it only shows auctions within your own country. Check the seller's ratings and their reviews from previous sales of the same product. Finally, make sure they have a good return policy in case your battery doesn't work.
As for the name-brand vs. off-brand question, you can get good off-brand batteries, and bad name-brand batteries. It's like gambling, but the chances are closer to 50/50.
Solution 2:
Another option for longer term (after you have determined why the battery is expanding like it is) may be to see about getting one of the Newer Tech (or other known manufacturer) batteries for your MBP, as they have longer life ratings for the charge. Newer Tech is available from Other World Computing (www.macsales.com), and I've seen it from a few other online sites as well. (I do not work for OWC, but have been very pleased with their products and service) The NewerTech ones I've checked on are rated at higher mA ratings than the original Apple batteries.
Solution 3:
I've purchased new Macbook Pro batteries twice from Ebay Powersellers. Both had the same capacity or slightly higher. My MBP is has the model identifier 3,1.
The transaction went fine both times.
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After a few weeks of usage I gave good feedback as there were not problems with the battery..... that was two early:
The first battery expanded too much. It would still fit into the MBP, but the dent affects my MBP in a way that I cannot click with the touchpad when using this battery.
The second battery dropped it's capacity to 67% after only 20 cycles.
I ended up purchasing an original battery. The end.
Solution 4:
I would go to your local Apple Store right away as a past Apple Genius that would be replaced in most cases your battery should never do that.'
You can also call 1-800-MY-APPLE and talk to Apple Care reps tell them you are afraid it's dangerous, It will get taken care of.