[ghodith]

> What they reproduced is the parameters. And that is exactly what you want. A repaired product should be as close to a freshly manufactured product as possible if you're going to be liable for it.

This has some sense to it, mostly from the liability point of view, but this

> if you design a portable consumer device and you know to what tolerance you need a battery to be adhered to the case to make it not come loose, you know what pressure, movement, adhesive etc. are needed to make that happen for the form factor the battery is going to fit in.

as someone who works in this field, this is overstating the matter quite a bit. The tolerances for something like pressure in this instance are going to be wide enough that "press firmly" would suffice in a rework document. It's made to be very simple on purpose for manufacturing, and a lot of slop is built in so that we're not in this situation where microns or milli-newtons matter and cause a battery fire somewhere down the line. The fixtures are primarily for efficiency gains, and in that sense I would agree with the gp that press fixtures are not practically necessary in an at-home version of this process.

[oneplane]

> The fixtures are primarily for efficiency gains

I agree, however, the battery example was a prime candidate for "it is not always as simple as it seems". LiPo batteries don't like getting squished.

[userbinator]

Pouch cells are normally under compression as force is required to keep the plates together. A firm press isn't going to hurt them. If you're applying enough force to actually crush and short the cell, you are far too ham-fisted to do work like this. In fact using a tool to apply pressure is more likely to cause damage.