[feature-request] Rail-guided TOH modular-attachment-standard

Obviously not getting the point ….

Nope, I had to swap JP-1-batteries 2-3x a week, as a sleek backup battery was easier to carry around than powerbricks or cables & chargers. This caused material fatigues. JP-1 batteries were designed and promoted as swapable. JP-2-batteries very obviously not.

SFOS-forum = your lawn ? I wouldn’t be posting ….

Totally agree :wink: :+1: …. but investing in prototyping, you wanna make sure, on which grounds you’re building and what for…. :man_tipping_hand:

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You could 3D-print a TOH which has rails for further TOSs on rails.

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It was my attempt at curmudgeonly humor, which was apparently unsuccessful!

I suppose I am missing the point, since you clearly pointed out the JP2 battery is not easily swappable, the need for a more robust way of cover removal.

I will admit I won’t be swapping covers daily, or am such a power user that I will drain a 5Ah battery multiple times in a day.

Just happy that the cover IS removable, that the battery CAN be replaced and that a fully Jolla phone came to fruition!

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That’s why this thread was started.

That’s why this page is existing.

And we all don’t know yet, if Jolla will develop some specific TOHs in the future, because:

A keyboard TOH surely is one of the economically safer bets IMHO.

Why not? Interesting idea actually.

Ok.
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This should be doable, and to cater for heavy TOHs, the back with rails could be screwed down to the phone:

There are also four M1.4 screw inserts (2.0 mm deep) around the device for securing TOH in place. This is useful for heavier and bulkier TOHs that may not have sufficient grip from plastic clips alone.
(From Jolla Phone TOH | Sailfish OS Documentation)

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I have nothing to add but to propose calling any standards

The Third Half :wink:

with variants like

  • sTtH4 1.0 - Four-screw variant, configuration 1.0
  • rTtH 1.0 - Rail-type variant
  • uTtH 1.0 - micro variant for small attachments
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Then we clearly need TtH C (or TtH type C) which works even upside down.

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In this case we need TtH USB-A where you have to turn it around twice to get it to attach!

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Remember to change the naming scheme in the middle of configuration version 3.0 and apply the changes retroactively in every version of 3.x!

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