Arduino Uno Keypad shield case

This is an alternative case for [LRT Pro Timer Free](https://lrtimelapse.com/lrtimelapse-pro-timer-free/). It holds an Arduino Uno with a keypad shield plus a [4xAA battery holder](https://www.aliexpress.com/item/Mayitr-Dual-Box-6-0V-4xAA-Battery-Holder-with-Futaba-Plug-For-RC-Aircraft-Car-Boat/32846556509.html) but can also be used as a general purpose case for the aforementioned hardware.

The original one is fine, but I'm not a big fan of having separate pieces. Also, the original battery h