12V6.5,

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LiFePO4
Mighty Max Battery ML7-12LI – 12 Volt 7 AH Deep Cycle Lithium Iron Phosphate (LiFePO4) Rechargeable and Maintenance Free Battery
Rated 5.00 out of 5
$59.99
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12V SLA Batteries
ML7-12 – 12 Volt 7.2 AH, F1 Terminal, Rechargeable SLA AGM Battery
Rated 4.82 out of 5
$19.99