How to connect a trickle charger

[josephpatrickgray]

I would like to attach a trickle charger since I won't drive my new to me 97 F250 powerstroke with twin batteries. Can I just connect it to one battery or do I need to charge each battery separetly?

Thanks,

Joe

[jesilvas]

welcome1:
The batteries are in parallel, so it's basically one big battery. Either one is fine.

[zROCK]

They make a marine battery charge that can charge up to 3 batteries at the same time without disconnecting the batteries. Depending on the trickle charger you will probably fry it leaving the batteries connected. They were never designed for that load

[ABOBB]

Rather than a trickle charger, you would be much better off with a maintainer. Trickle chargers provide a constant low amp charge, while a maintainer senses the battery voltage, and provides a low amp charge when needed to restore voltage to proper levels.

[1Dieselman]

When I was researching the same thing this is what I was told to use CTEK 56-353 - CTEK Power Multi US 7002 Battery Chargers - Overview - SummitRacing.com

[Dave]

Amazon.com: Xtreme Pulse Tech Battery Maintainer Charger: Everything Else

Amazon.com: Xtreme Pulse Tech Battery Maintainer Charger: Everything Else

what you want is something like this