This is a high quality replacement battery that uses battery cells manufactured by Samsung.
Note: Lithium ion battery shipping regulations limit the shipping methods for orders containing batteries. Domestic orders may only be shipped via Standard shipping. iFixit is not able to ship batteries internationally or outside the contiguous US at this time. iFixit Customer Support will contact you if your order needs to be modified after it is placed.
My MacBook keyboard after seven years, lots of typing and one errant berries smoothie later, was missing a few keys and had totally lost the use of its delete key. But the final straw was an e key that had decided to either not work or depress itself continuously mid-typing likeeeeeeeeeeeeeeeeeeeeee . . .