I have used Deka Batteries since 2004 not one problem what so ever, if your running units(graphs)off the cranking battery,they make a special
battery just for cranking and using multi-units.
As far as chargers go there are a lot of good ones but I like Noco Chargers https://no.co/products/charging/onboard
Formerly known as yeaitsme
I thought a thought, that I thought I had thought, but the thought that I had thought, wasnt the thought that I had thought I had thought, so maybe if I had thought the thought that I thought I thought, I wouldn't of thought so much