A quick comment on batteries and on charging: If your batteries are conventional "wet cell" lead acid batteries, be careful you don't splash the electrolyte solution into your eyes when removing caps to check fluid level or when adding distilled or deionized water. Goggles are appropriate, and no smoking or open flame nearby as any hydrogen gas emitted during or after charging is explosive. Also, the electrolyte expands in each cell when charged and can overflow if too much water is added when the batteries are discharged, wasting and weakening electrolyte. Conversely, if levels are barely above the plates inside when the battery is fully charged, levels might drop below the tops of the plates later when the battery is discharged. So, not too much and not too little.
The other issue is charging the batteries when plugging in to 120 volt AC power at home or in an RV park: Some systems require various battery disconnect switches to already be on when you plug in for the batteries to be charged and off if they're already fully charged and you want to isolate them, followed by your turning the switch on after plugging in. Others will confirm if this is so for current Phoenix Cruisers, or not.
