Also dont be conned by someone telling you to use Leisure batts over Truck batts.
A leisure battery is cool because it can be run pretty much flat and then recharged without wrecking the plates inside the chambers where as a 'normal' battery can't, if you run one of these flat the plates get twisted and corroded and eventually fail.
So leisure batts sound best right ? but consider this, your hydro system will run until the amperage is to low (less than 120amp) to spin the pump motor quick enough to build up enough bar pressure in your system to lift the car, leading you to think the batts are flat - THEY'RE NOT, indeed they have run low, but are not flat they're just too low on power to allow the pump motor to spin, so what do you do ? you re-charge.
You never run the batts totally flat so therefore you dont actually need the leisure battery option, just look after your 'normal' batts !
Leisure batts do however come in higher amperage than 'normal' batts.
If you run your stereo off of your hydro batts then things are a little different as this will drain the battery until its flat.
When you charge a battery, after intial connection to the charger they go through a duty cycle until they are at a state ready to charge, usually about 1-2hrs. Fast chargers pump extra current for a bit to try and speed this process up, which also wrecks the battery !
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