A cautionary note.
One aught to be very careful on your lithium battery research and purchases.
My understanding is that some cannot or should not be charged with smart or pulse type battery chargers.
I am not sure then what you charge them with if most quality set and forget smart chargers on the general retail market are excluded.
I do know though that balanced cell charging and discharging within the lithium batteries is critical. This is usually done with a BMS ( Battery Management System ) either between each cell and or wholisticly within the battery.
The Fusion brand is mentioned in a most recent link on the thread yet the site says that they cannot be charged as I have mentioned in my 2nd sentence above.
Yet in the Fusion site
http://www.fusionagmbatteries.com.au...onPolymer.aspx says, Quote ‘Fusion Lithium Batteries are also one of the only Lithium Batteries that can be charged using normal 12V car chargers/ lead-acid battery chargers / alternators’ Unquote.
I am just in the process of Offgriding an old pop up camper. As I already have a usable 40Ah AGM battery, when it finally fades or lets the smoke out, a Fusion style Lithium will be its replacement so long as I do not have to also replace the Ctek D250SA DC-DC solar charging system.
I trust this helps rather than hinders or misleads.