The 12 mini and 13 mini had very substandard batteries compared to the mainline version or the SE.
There are a lot of people who probably would've bought the mini but instead of opted for the SE because battery life degraded so quickly.
There are a lot of people who probably would've bought the mini but instead of opted for the SE because battery life degraded so quickly.
The only thing that used less power on the mini was the smaller screen, but that doesn't save enough power to make up for a physically smaller battery.
That said I wish they'd release a thicker version to compensate