Original release notes
WHAT'S CHANGED
This release focuses on reliability, battery care and update speed. It fixes a Bitcoin app crash when reviewing multisig signers and a set of Airlock and USB issues, makes firmware updates much faster, and improves how Passport Prime charges and protects its battery.
NEW FEATURES
- Passport Prime now shows a full-screen alert when the battery reaches 2% or below, warning that it will shut down automatically. Plugging in dismisses the alert. If you unplug again before the battery reaches a safe level, the alert returns.
IMPROVEMENTS
- Firmware updates are now significantly faster. We replaced bzip2 with zstd compression, took advantage of hardware-accelerated SHA256, and optimized the filesystem write path, cutting the time to apply a 30 MB update significantly.
- Charging is gentler on the battery. Instead of cycling between 4.4V and 4.25V when full, Passport Prime now holds it at a steady 4.3V. This reduces long-term wear and makes the battery percentage more accurate.
- Passport Prime now shuts down cleanly before the battery runs flat, even if the battery percentage has drifted after many partial charges.
BUG FIXES
- Fixed a Bitcoin app crash that could occur when scrolling through the signers list a multisig wallet.
- Fixed USB issues that could cause Airlock to hang Windows Explorer, leave microSD cards and USB drives unreadable after Passport Prime wrote to them, write 0 byte files to SD cards or stop iPhones and some laptops from recognising Passport Prime over USB after a reboot.
- Fixed the launcher price graph overlapping the price and BTC labels. The layout now matches the updated design, and older price history is drawn more faintly so it no longer hides the numbers.
