Support for DIY Repairs (e.g. Battery Replacement) on Panda Touch

[Hi @bigtreetech @BTTJUSTIN,
**Summary**
Requesting official support or guidance for DIY repair and maintenance of the Panda Touch—especially for common issues like battery replacement.

**Details**
It would be helpful if the following resources were made available:

- Disassembly instructions or teardown guidance
- Battery specifications and replacement procedure
- Connector/pinout documentation (if applicable)
- Compatible replacement part numbers
- Clarification on warranty implications for self-repair

**Why This Matters**
Providing this info enables users to keep their devices running longer, promotes sustainability, reduces e-waste, and fosters a stronger user community. Many users are technically capable of performing these repairs themselves.

**Suggested Approach**
Consider publishing a PDF teardown, wiki page, or community-reviewed repair guide, even in a beta or unofficial form.
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The issue names no repository files, tests, or entry points; begin by reviewing the Panda Touch hardware documentation and the requested repair topics. Done would require publishing official or community-reviewed guidance covering disassembly, battery specifications and replacement, connector or pinout details, compatible parts, and warranty implications.

Written by the indexing model from the issue text.