iPadOS 27 developer beta 1 (build 24A5355q) is showing a familiar pattern on M4 iPad Pro models: increased heat, inconsistent battery life, and performance that takes time to stabilize. Most reports point to a single temporary cause.
After installing iPadOS 27 developer beta 1, some users have reported that background indexing can continue for more than 36 hours. The operating system even notes that longer charging sessions may help the process finish sooner, suggesting Apple expects indexing to be particularly demanding.
Much of the early heat and battery drain appears to be tied to this activity. Supporting Siri AI requires more extensive indexing than previous iPadOS releases, keeping the CPU active in the background for extended periods during the first few days after installation.
Battery life results have been inconsistent rather than universally poor. Some M4 iPad Pro users have reported better endurance than they experienced on iPadOS 26.5, while others continue to see faster battery drain and elevated temperatures during the first few days after updating. In many cases, users are waiting for background indexing to finish before making a final judgment.
For now, the available reports suggest that heat and battery performance vary significantly from device to device. Until indexing and other post-install tasks are complete, it is difficult to separate temporary beta behavior from longer-term battery performance.
The Siri AI RAM requirement on M4 iPad Pro
There is a hardware caveat affecting some iPad Pro owners. Siri AI in iPadOS 27 requires an M4 iPad or newer with at least 12GB of RAM. The 512GB M4 iPad Pro ships with 8GB of RAM and does not meet this requirement.
This means the headline feature is not available on what was previously Apple’s top-tier tablet configuration. Users in this category still get most Siri AI improvements and the rest of the iPadOS 27 features, but the most demanding on-device model is excluded.
That distinction is important when evaluating performance differences across M4 iPad Pro models after the update.
Performance gains confirmed in Beta 1
Beyond the battery and heat concerns, early performance reports are largely positive. Apple has focused iPadOS 27 on bug fixes and performance in a manner reminiscent of Mac OS X Snow Leopard. The specific gains confirmed so far include:
- Apps launch noticeably faster
- AirDrop transfers are quicker
- The keyboard loads faster on first appearance
- File browsing and transfers to external USB drives are up to 5 times faster than before
- Gestures for closing, switching, and dragging windows are more responsive
- Apple has expanded the CPU scheduler to all iPadOS 27-supported iPads for broader performance gains
The overall verdict from early beta testers is that this is a solid first release with small to medium bugs and a cleaner start compared to previous years.
Apple also appears to have addressed one of the most consistent complaints from the iOS 26 cycle. Liquid Glass, the UI rendering layer introduced last year, was previously identified as a major contributor to battery drain due to increased graphics workload. Apple says the implementation in iPadOS 27 has been optimised, with improved battery performance expected as the update matures beyond the beta stage.
The developer beta is available to registered developers now, with a public beta expected in July and a full release scheduled for fall 2026. For users seeing heat and battery changes on M4 iPad Pro, the key factor is allowing background indexing to complete before judging performance. If issues persist beyond that window, it likely points to a separate underlying problem.
Learn how to install the iPadOS 27 beta on your iPad for free here.
