Works great for me

Check out the Anker PowerWave Alloy Pad. It does 15W fast charging for Samsung phones, plus it has a premium aluminum alloy casing that looks and feels high-end. I've had good experiences with Anker's charging products. It's a bit pricey but worth it IMO.

I have been testing chargers since the early Galaxy days and honestly... most third-party brands overpromise on speed. Since the S24 Ultra hits its peak at 15W for wireless, you gotta be careful. I usually recommend the Samsung 15W Wireless Charger Duo with Power Adapter because it actually has a cooling fan built right in. Heat is the enemy of your battery life, so that fan makes a massive difference during long overnight sessions. If you want something more compact, the Spigen ArcField Wireless Charger 15W is another solid choice. It has a nice weight to it so it wont slide around your nightstand when you're fumbling for it in the dark. Just make sure you pair it with a decent 25W or 45W brick or it wont hit those top speeds. I have seen too many people buy a fast pad and then plug it into an old iPhone cube... dont do that. Stick to the official Samsung stuff or Spigen and you will be fine.

If you want a premium option, check out the Belkin BoostCharge Pro. It supports 15W fast wireless charging for Samsung devices and has a sleek design. A bit pricey, but the build quality is excellent and it comes with a wall adapter.

If you want a premium option, the Belkin Boost Charge Pro 3-in-1 Wireless Charging Pad is amazing. It can charge your S24 Ultra, Galaxy Watch, and Galaxy Buds all at once. Supports 15W fast charging for the phone. It's expensive but super convenient if you have multiple Samsung devices.

Samsung Official 45W USB-C Super Fast Charging Wall Charger: https://www.amazon.com/Samsung-Official-USB-C-Charging-Charger/dp/B081GBB3NQ?t=t=7649-20