The iPod has excellent battery life, and I've upgraded it with an iFlash SD adaptor. The iPhone 4S has a small screen, and removable battery on a Third Rail case.
I had a quick look last week after the iPhone SE was discontinued. The highest small-screen (3.5") resolution is the iPhone 4 display (960x640). It's even higher than newer phones, according to dpi.lv. The best Raspberry Pi screen is 320x640.
What we as hobbyists need is a 3.5" RPi touchscreen module with higher resolution. Then the iPod modding community can provide a case, and Seeed can provide a phone. The problem is, I couldn't find anybody manufacturing high-res small size touchscreens.
> I couldn't find anybody manufacturing high-res small size touchscreens.
RPi only supports 2 lanes of MIPI DSI interface, iPhone 4 screens (that are still manufactured and offered for $5-15 on aliexpress) use 4 lanes precisely because they are higher resolution.
The iPod has excellent battery life, and I've upgraded it with an iFlash SD adaptor. The iPhone 4S has a small screen, and removable battery on a Third Rail case.
I had a quick look last week after the iPhone SE was discontinued. The highest small-screen (3.5") resolution is the iPhone 4 display (960x640). It's even higher than newer phones, according to dpi.lv. The best Raspberry Pi screen is 320x640.
What we as hobbyists need is a 3.5" RPi touchscreen module with higher resolution. Then the iPod modding community can provide a case, and Seeed can provide a phone. The problem is, I couldn't find anybody manufacturing high-res small size touchscreens.