Originally Posted by Plan Man
I have a 233s roo.
1: can I just buy a lithium battery to replace an agm battery.
2: can I have a mix of battery types. One lithium one agm
On #1, yes you can buy one and replace an AGM. You can also use your existing converter/charger however it won't fully charge the Lithium battery unless it has the ability to force it into a 14.4 volt or more output like the Charge Wizard on Progressive Dynamic's units. The regular converter will top battery charge around 90% and won't "cell balance"..
On #2, you might get away with a Lithium and AGM battery in parallel but because of the totally different characteristics I certainly wouldn't.
If you have one Lithium battery and a charger that will fully charge it, you will have essentially the same capacity of two AGM batteries as the Lithium battery can be discharged far deeper (without long term damage) than the AGM. At 1/4th the weight of two AGM's too.