Your Battery Maintainer/Charger choice?

[Botamon]

I bet I have at least a dozen of these BatteryMinder units. Motorcycle, quad, tractors, everything I'm not driving daily is hooked up. In my experience these things have doubled the average life of my batteries.

But I don't use the alligator clips the units come with. I install leads on each battery so I can plug in without having to physically access the battery. Much handier - makes it that much more likely I'll plug in when I park the vehicle.

I also have some larger BatteryMinder units for when more charging power is needed. My Miller Bobcat welder, which sits in a shed with no power, has a solar-powered BatteryMinder connected.

 

[Old Machinist]

This reminds me. I have two machines I need to put SAE pigtails back on for the winter. I can't remember why they got removed but I have solar chargers sitting idle while two of my mowers are disconnected.

 

[Lil Foot]

For my Optimas:
(Lil Foot, Rhino)

Optima Digital 400

12V PERFORMANCE CHARGER AND BATTERY MAINTAINER Looking for a car, marine, motorcycle, or other AGM battery charger? The OPTIMA Chargers Digital 400 12V Performance Maintainer and Battery Charger automatically maximizes battery life and performance with a built-in battery health mode. It also...

batteryguys.com

For lead acid:
(B7100, Mini Ex)

8A 12V Fully Automatic Rapid Charger - Schumacher Electric

Looking for a 8A 12V Fully Automatic Rapid Charger? Visit Schumacher Electric for portable jump starters, battery starters, EV chargers, and more.

www.schumacherelectric.com

For various motorcycles:

Duraboost Battery Charger 750 - Cycle Gear

The DuraBoost Charger/Maintainer 750 is perfect for those wanting to charge and maintain their 12v lead acid battery. It constantly monitors your batt…

www.cyclegear.com

Megaboost Pro Series 4000 Charger And Maintainer - Cycle Gear

The MegaBoost Charger/Maintainer 4000 is perfect for those wanting to charge and maintain their 6v or 12v lead acid battery. Shop Cycle Gear for our 30-day best price guarantee & 90-day hassle free returns.

www.cyclegear.com

Amazon.com: 6V 12V Battery Charger 1.5A Automatic Battery maintainer trickle Battery Charger Smart Float Charger for auto car Motorcycle Lawn Mower Boat Motorcycle Snowmobile : Automotive

Buy 6V 12V Battery Charger 1.5A Automatic Battery maintainer trickle Battery Charger Smart Float Charger for auto car Motorcycle Lawn Mower Boat Motorcycle Snowmobile: Battery Chargers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

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LoadTrail dump trailer has a built-in smart charger/maintainer, but it's 150mi from here, so I can't check the brand/model.
(And no. I don't remember it; I have trouble remembering what I had for breakfast)