Amazon.com: 12.8 volt lithium ion battery pack
12V 12Ah Deep Cycle LiFePO4 Battery, RoyPow 12 volt Rechargeable Lithium Iron Phosphate Battery with low-temperature cut-off, 3500~8000 Cycles for Kid Scooters, Solar System, Fish Finder, RV. 4.3 out of 5 stars. 117. $79.99.
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