I picked up this 45W, the other day on sale, it's a charger +battery

it did not trigger the slow charge warning, but I have only used it for a few days.

Anker 521 - Anker 45W Wall Charger with...

https://www.amazon.com/dp/B0B4J76TJ9

May not be ideal for all use cases, but works well enough for me so far.

the price was right.