shouldn't be much of a difference except price. Most likely your "depot" one wont live up to the hype with the whole better power and so on, but it will save you money. Just make sure it actually fits your laptop. Look at it this way, if it only costs you a third or even half of what your actual manufacturer wants then you can buy 2 or 3 replacements for the same cost as the one from Dell or whoever. I would Google the company and see what complaints there are out there. They might be known for fighting warranty work and always blaming user error which violates warranty or something. Just look into them BEFORE you purchase. One of the benefits of buying from say BMW for my car parts is I know they have a rep to uphold. Same with computer parts. for the most part anyway. You get the idea.