I use this one: https://www.amazon.com/Padded-Magnetic-Counter-Balance-Oculus/dp/B086Y6V2H4/

I paired it with a 10000Mah battery and it's pretty comfortable and lasts forever. Honestly, I bought it because the elite strap was sold out when I was trying to buy one and thought I just give this setup to my nephew when I upgraded. But since then I haven't felt the need to upgrade at all. It's very comfortable and the battery creates a great counter balance. I can wear it a lot looser and it's comfy for long periods of time. Also with other implementations of this "battery on the back" type thing it was always hard to get on and off in case I wanted to lay down and watch a movie. With this thing it just comes right off. Honestly only negative I will say is it makes it harder to adjust the stock strap with this thing on.

I went with this https://www.amazon.com/gp/aw/d/B086Y6V2H4?psc=1&ref=ppx_pop_mob_b_asin_title It also can hold batteries, even non magnetic ones with a slight and easy modification. Sits over the stock strap and improves it all around.