I purchased a very small lithium battery the other day for an on demand hybrid camping shower I am putting together for the Northwest summer. The battery will power the water pump via a solar panel.
After doing a fair bit of research on the battery I have decided to also use it for the starter battery on the Centurion. This battery is tiny and inline with my weight savings strategy. Here is a link that discusses lithium starter battery sizing =
Lithium battery replacement for automobiles and motorcycles
I went with the Shorai LFX Lithium Iron Battery LFX12A1-BS12. Main reason was that these are the safest Lithium chemistry available. Also the price difference between this and the 7ah unit is only $27. The size and weight difference is virtually the same. I wanted something with a bit more power and CCA to make sure it will handle everything I can throw at it. This battery may be overkill but I want the Centurion to be bullet proof in design.
Features:
• Faster cranking for better starts
• Ultra light- one fifth the weight of lead-acid batteries on average
• Holds unloaded charge for one year without maintenance
• Zero sulfation for longer service life
• Super-fast recharge rate
• No explosive gasses during charge, no lead, no acid
• Military spec carbon composite case
• Multiple terminal connection options
• Includes adhesive back foam sheets
• Factory activated
• Environmentally friendly
• 2 year warranty
Specs:
• 12 V- Volts
• 155 CCA- Cold Cranking Amps
• 12 Ah- Amp Hours
• 12 A Max Charge Rate
• Weight: 1.35 lbs/0.6125 kg
• Case Size 1: 66mm/2.6" x 148mm/5.83" x 105mm/4.13"
• See Shorai Specs PDF below for full fitment guide
Here is a link to this battery if you want to read more about it =
Shorai Lithium Battery LFX12A1-BS12 - RevZilla
Here is a link on battery charging =
How to Charge a Lithium Phosphate Motorcycle Battery