"Chris Green" wrote in message
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In uk.d-i-y Pamela wrote:
On 12:55 28 Apr 2021, Theo said:

In uk.d-i-y Chris in Makati wrote:
Phone manufacturers source their batteries from various
third-party suppliers. Each of those suppliers probably sell
their batteries via different channels to any number of other
customers.

So is a battery still "genuine" if it came from the same factory,
but didn't have a particular label on it?

I think the 'made in the same factory as Kelloggs' argument is
overdone. Most top-tier brands (Apple, Samsung, etc) have
agreements with major contract manufacturers (Foxconn, etc).
Foxconn have enough of a reputation to protect that they won't
build knockoff iPhones on the late shift and let them into the
market.

However a manufacturer can run two lines with one producing
batteries of lower spec (and lower cost) than the other.

It's *possible* but if you think about it that's quite difficult to
do. In reality having a single production line producing just one
type of battery would probably make that battery cheaper than both
types being made on two separate production lines.

But there is never just one type of battery with internal phone batteries.