Do NOT charge that lithium with a basic trickle charger. That is what cooked my original.
I had my original hooked up to a basic wet lead acid. No battery isolation module, had no problems. The lithium's do rest at a higher voltage, but once the vehicle starts and the alternator kicks in, the battery is being charged back past the resting voltage.
Lithium's recharge and discharge at crazy fast rates. I was told by Kevin at juicebox that the easiest way of recharging a weak or dead lithium is literally hooking it up to a fresh 12v battery, it will recharge within seconds.
David, feel free to contact me if you have any further questions, or call Juicebox (586) 879-6085 and ask for Kevin.