Just a heads up a few users have tried the glass screen protector in the link and it seems to fit the Bittboy.
2x Tempered Glass Screen Protector for LEICA ME M9 M9P M9P ME Camera (compatible with the bittboy) https://ebay.us/sc2R6n
SCREEN:3.0 inch IPS (320x240)
SOC:Allwinner F1C100S
CPU:533-798 MHz Single-Core ARM926-EJS
GPU:Custom 2D only
RAM:32 MB SD RAM
Storage:ext. MicroSD
BATTERY:1020mAh ,
SCREEN:3.0 inch IPS (320x240)
SOC:Allwinner F1C100S
CPU:533-798 MHz Single-Core ARM926-EJS
GPU:Custom 2D only
RAM:32 MB SD RAM
Storage:16 GB + ext. MicroSD
BATTERY:1500mAh, Type: BP-4L
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Screen: 2.4" IPS 320x240
CPU: Allwinner F1C100S
RAM: 32MB
SDCard: supported up to 128GB
Internal fixed Dimensions: 12.3cm x5.6cm x 1.4cm Weight: 100G
Battery: 1000mAh
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SCREEN: 2.5 inch LCD/IPS (320x240)
SOC:Allwinner F1C500S CPU:408-900 MHz Single-Core ARM926-EJS
RAM:32MB DDR1 RAM
SOTORAGE:16MB + ext. MicroSD
BATTERY:700 mAh (replaceable)
Will we be able to buy spare replacement parts for the bittboy in the future?