https://www.aliexpress.com/item/32700364875.html?spm=a2g0o.productlist.0.0.9d261819AIDUla&algo_pvid=7cf8aa7e-2187-46d4-8b6f-ea49405f4c89&algo_expid=7cf8aa7e-2187-46d4-8b6f-ea49405f4c89-40&btsid=40a84bfb-92d8-44fb-825f-a486862a5670&ws_ab_test=searchweb0_0,searchweb201602_7,searchweb201603_53
This might not be what you are looking for, but i thought i would mention it. The cons are the fan is loud, its a boost converter so dc-dc only and power source must be a lower voltage than the battery, and it always defaults to setting 0.
On the positive side: its only $30 not $300 and you can set voltage, set amps, set profiles, set charge time, set source voltage cutoff. I use it as a regular charger with a laptop brick, as a go between with a hoverboard pack, and even a cigarette lighter port charger.