Amazon.com: Ampere Time 12V 50Ah Lithium LiFePO4 Battery, Ideal Replacement for 12V 100Ah AGM SLA Battery, More Efficient Output & Much Lighter, 4000+ Cycles, Perfect for Boat, Security Devices, Camping, etc. :
Sample --12V 120ah Lithium LiFePO4 Phosphate Deep Cycle Rechargeable Battery with BMS for Backup Power - China Lithium Battery, 12V Lithium Battery | Made-in-China.com