In reply to kipper12:
Whatever you get, I'd say it's worth getting one that can be attached to the battery via terminal lugs, with a connectorised cable with a fuse near the battery side. Fit the connector and it stays on over the years, no worries about crocodile clips popping off et, and it's seconds to (dis)connect the charger. I got some "MOTOPOWER 12V 1000mA" units for our cars during Covid and they did fine. I still stick them on over prolonged periods of disuse for either vehicle.
You don't say if this is for garaged use or for outdoor use - if it's outdoor you want a decent IP rating if it's going to live in a wheel well, or a long mains cable to run to an IP rated extension lead on the ground under the vehicle, or tucked in to a wheel well.
> mostly to trickle charge my existing vehicle
If you want a maintenance charger, get one separately to a “proper” charger. They’re not expensive and the small size and permanent connectorised cabling suit their purpose well.
Post edited at 22:36