Originally Posted by
drivesafe
Hi Vern and yes you could charge straight from the alternator, but you need a way of separating the batteries ( lead acid cranking battery from the Lithium battery ) when the motor is not running.
NOTE, I specifically stated when the MOTOR is not running, not when the IGNITION is turned off.
This is one of the many potential problems of mixing the two types of batteries.
In Bazzle's case, not having a STOP/START vehicle, the problem is just separating the batteries when the alternator is not working, otherwise the lithium will continually discharge back into the lead acid battery.
This is great for the lead acid battery but it will continually discharge your lithium battery and if you do not drive the vehicle fo a while, you may actually flatten the lithium battery.
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