Handheld Devices With Replaceable Batteries

Devices that contain user-replaceable batteries without the following obstacles or traps:

Glued-on battery covers.
Glued-in-batteries.
Batteries that require proprietary tooling that is not widely available.
Firmware-locked batteries that don’t allow replacements to work.
Batteries that are not supplied by the manufacturer and also not standardized or available.

Key Indicators And Symbols

Standardized: This refers to an ubiquitous and standardized battery format that can be purchased from electronics stores instead of directly from the device manufacturer. One example of that is 18650 batteries.
[Purpose-Built]: This means that the battery is built specifically for that device and has to be obtained from the manufacturer or a third-party vendor that builds that specific model. These batteries are not standardized and are harder to find. Most phone batteries are of this variety. However, some are replaceable.
Prismatic: Prismatic is a thin, flat, rectangular cell design. These are generally harder to find due to a lower likelihood of standardization. However, they are necessary for thinner devices such as phones and tablets.

Standardized Cells (18650 and other widely used standards).

ClockworkPi Pico Calc – [Standardized | Widely Available] – 18650 cells.
ClockworkPi uConsole Kit RPI-CM4 Lite. [Standardized | Widely Available] – 18650 cells.
Fairphone 5. [Prismatic – Purpose-Built].
Fairphone 4. [Prismatic – Purpose-Built].
Fairphone 3. [Prismatic – Purpose-Built].
Fairphone 3+. [Prismatic – Purpose-Built].