Which portable power bank works best for the ROG Ally X?

In my experience, finding a bank that actually holds that 65W sustained output without thermal throttling is way trickier than the spec sheets make it look. Ive tried sooo many over the years with the OG Ally and now the X, and a lot of them drop voltage as soon as they get even slightly warm, which is like... super annoying when youre mid-boss fight in Elden Ring, right?

Here is what I recommend for the Ally X:

1. The Anker 737 Power Bank (PowerCore 24K) 24,000mAh 140W is basically the gold standard. It uses PD 3.1 and handles the 65W handshake perfectly every time. Plus, the built-in screen lets you see exactly how many watts youre pulling, which is actually reallyyy helpful for confirming bypass charging is active.
2. Honestly, if you want something slimmer for a travel bag, the Baseus Blade 100W Laptop Power Bank 20,000mAh is okay, but it gets way hotter than the Anker under heavy load, so I think the Anker is a safer bet for longevity.
3. For the cable setup, seriously, get a UGREEN 100W USB C Cable Right Angle 2-Pack. That 90-degree connector is a total game changer for the Ally X's top ports so the wire isnt digging into your hands while youre playing.

Basically, you need a bank that supports the 20V/3.25A profile to keep 30W Turbo mode from dropping. The Anker 737 has never triggered that slow charger warning for me, even when its low on juice. It’s a bit bulky, but for those cross-country trips? Totally worth it. Good luck with the new X!! peace

So, coming back to this... I went through this exact same headache last year with my handheld setup. Honestly, finding a bank that doesn't throttle is such a chore. I've tried many over the years, and ngl, it's basically a gamble with some brands. I hate that "slow charger" warning more than anything!!

In my experience, these are the combos that actually held up for my long flights:
- I eventually settled on the CUKTECH 20 Power Bank 25000mAh 210W. It supports PD 3.1 and handles sustained 65W+ output way better than some other ones I've used that drop off at 50% capacity.
- To fix the clunky cable issue, I started using a UGREEN 100W USB C to USB C Cable Right Angle. It makes the grip feel way more natural while charging from the top ports.
- I also messed around with the SHARGE Shargeek 100 Power Bank 25600mAh. It's a bit pricey but the thermal management is actually top-tier for those heavy AAA sessions.

But yeah, just sharing my journey with it... finding the right brick is a total rabbit hole lol.

Seconding the recommendation above about the thermal throttling... honestly it's a HUGE deal with the Ally X. I've been thinking about this more and I really gotta warn you guys to be careful with the cables ur using. People always focus on the bank itself, but if you're using a cheap, non-certified cable to push 65W for hours while gaming, it's gonna get dangerously hot. I actually had a cable start smelling like burnt plastic once because it couldn't handle the sustained load... literally so scary!

You definitely wanna make sure whatever bank you get has decent heat dissipation too. Some of those slim ones might look cool but they're basically small heaters after 20 minutes of Cyberpunk. I'd suggest looking for something with a digital display that shows the actual temp or wattage output so you can monitor it. Better safe than sorry when ur carrying a $800 device in ur hands!! Just keep an eye on that bypass charging symbol to make sure it's actually working right. gl with the hunt!

Can vouch for this

TL;DR: Look at the CUKTECH 20 Power Bank 210W 25000mAh.

So yeah, +1 to the thermal warnings. In my experience, sustained 65W is rare tbh. Market research shows Cuktech (formerly ZMI) has superior thermal regulation. It actually supports the PPS 3.0 standards required for the Ally’s 30W Turbo mode. If thats out of stock, the UGREEN Nexode 145W Power Bank 25000mAh is a solid runner-up with high-wattage stability. Both avoid that "slow charger" warning. Cheers!

Ive been through so many of these over the years trying to find the perfect balance for handhelds. Honestly, most of the big names throttle way too fast once they get toasty. In my experience, if you want something that actually holds that 65W without the dreaded slow charger warning, you gotta look at the brands that over-engineer their cooling. Heres what I've been running lately:

• AOHI Magcube 140W 27000mAh Power Bank: This thing is built like a tank. It supports PD 3.1 and handles the Ally Xs Turbo spikes easily. The thermal management is way better than my old bricks, though its kinda heavy for a travel kit.
• MOVE SPEED 130W 25000mAh Power Bank: Weird name, I know, but surprisingly solid. It has a high-quality display that shows real-time wattage, which is great for us nerds who like to see exactly what the device is drawing. Its a bit cheaper too.
• Iniu 140W 27000mAh Power Bank: Currently my favorite because it supports the specific PPS steps the Ally X needs to stay at 30W without the wattage dropping when the bank hits 50 percent. I actually DIYed a small Velcro mount for the back of my travel case to hold these. Just make sure you grab a Silkland USB C to USB C Cable 240W or something similar with a right-angle adapter so you dont strain the Allys ports while playing handheld. It makes a huge difference for the grip.

Wow ok that changes things. Gonna have to rethink my approach now.