The battery side cover is direct fit for GoPro Hero 9/10. only suitable for GoPro 9/10 black. Built-in EVA foam, good connectivity and stronger than the old buffer seismic. This battery cover is good choice to avoid such problems.
eBay
【Excellent Performance】Non-slip design inside of the handlebar mount can protect your poles from being scratched. 【Versatile Mount】Bike handlebar attaches are perfect for bicycling, mountain biking, motocross, skiing, kayaking, SUP surfing, water sports, and other outdoor action activities.
eBay
1 Set Adapter Mount Bracket. Mini and lightweight, easy to mount on the device. The surface has fine stripes. Color: Black. Equipped with a counterweight iron block to adjust the balance. After the balance, it can effectively reduce the pressure of the motor that avoid overloading and heating the motor, which help to make shooting more free.
eBay
Ball Mount for Gopro Hero 12 11 10 9 8 Black DJI Osmo Action 3 4 Insta360 X4 X3 GO3 ACE PRO SJCAM Ball Head Mount Adapter. Compatible with RAM mounts, with GoPro compatible screw hole. Screw length: approx.
eBay
For sale, GoPro Hero 13 Black Limited Edition in Polar White Colour.
eBay
We reply within 24 hours (Mon–Sat).
eBay
With this GoPro HERO Adhesive Sticky 3M Base Pads & Mounts Set. ✔ Ultimate Durability: Crafted from high-quality plastic, these mounts are built to withstand tough conditions while maintaining neutral buoyancy for smooth underwater filming.
eBay
Great  handlebar mount for any action camera standard for size
eBay