Amazon.com: Dakota Lithium - Power Box with 12V 10Ah LiFePO4 Battery Included - 11 Year USA Warranty 2000+ Deep Cycle Battery Box with DC and USB Ports - Water/Shock Resistant - Camping,
Lithium Ion Polymer Battery - 3.7V 10050mAh (10 Ah) : ID 5035 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: GOLDENMATE 12V 10Ah Lithium LiFePO4 Deep Cycle Battery, Rechargeable Battery Up to 4000+ Cycles, Built-in BMS, Lithium Iron Phosphate for Solar, Marine, Home Energy Storage, Off-Grid Applications : Health & Household