Where to purchase replacement battery if part is not available on parts store (part #844204-855)

[A_B_A]

I'm looking to purchase a new battery for my laptop for self installation, but I can't figure out what I should do if it's not available on the parts store. I looked on the parts surfer (http://pro-psurf-web-glb.austin.hp.com/Search.aspx?searchText=W0U47AV) and the part was listed with the description "ASSY-BATTERY 4C 55WH 3.615A LI MB04055XL", but where other parts had a tick box to add to cart, this part had the text "N/A". Where should I look for replacement batteries?

[BrianTan]

I can see a few listings on Amazon.com and eBay.com

[A_B_A]

Thanks for your response. How reliable are batteries from Amazon or Ebay? I'm a bit worried about counterfeit or shoddy batteries.

[BrianTan]

My experience with laptop batteries from eBay is generally ok. Not so much for mobile phone batteries.

For Amazon, check the reviews and answers. I would go for the popular/heavily reviewed ones and avoid very cheap (price) ones.