You want a bench charger that can provide plenty of amps
DEWALT DXAEC80 30 Amp Bench Battery Charger: 80 Amp Engine Start, 2 Amp Maintainer, 120V AC Outlet, 3.1A USB Port, Battery Clamps
https://www.amazon.com/dp/B06XDJZC1M..._hLpVEbGB64G2D
I use this one that's rated for 30 amp continuous. Used it for a 2 hour flash session when I was flashing my idrive unit to be upgraded and compatible with full screen CarPlay