This GPi Case 2 heatsink works well for me : r/retroflag_gpi

Compatible with Raspberry Pi CM4 Lite/eMMC Safe Shutdown;LED power indicator;Add power save mode button Built-in 4000mAh lithium battery;3.0 inch IPS

Retroflag GPi CASE 2 with Carrying Bag,32GB Card,Heatsinks for Raspberry Pi CM4, with 3.0” LCD and 4000mAh Li-on Rechargeable Battery

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choose_a_handheld [Batocera.linux - Wiki]

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GPi Case 2 heatsink install [shell modification requierd] : r

RETROFLAG GPI CASE 2W with Slow Motion Function 3.0 ''LCD Screen

New RPi4 case from retroflag. Thoughts? - Lakka - Libretro Forums

Compatible with Raspberry Pi CM4 Lite/eMMC Safe Shutdown;LED power indicator;Add power save mode button Built-in 4000mAh lithium battery;3.0 inch IPS

Retroflag GPi CASE 2 with Carrying Bag,32GB Card,Heatsinks for Raspberry Pi CM4, with 3.0” LCD and 4000mAh Li-on Rechargeable Battery

The Best Raspberry Pi Cases 2024