Neuton Power NP1212 12V 12Ah Replacement Battery (3 Pack)
Amazon.com: Replacement for Ultra Tech DOPPLER FLOW NP1212 Battery - Replacement UB1213 Universal Sealed Lead Acid Battery (12V, 1.3Ah, 1300mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters :
Neuton Power NP1212 12V 12Ah Battery with F2 Terminals
Compatible INTERALIA DIGITAL NP1212 Battery - Replacement UB613 Universal Sealed Lead Acid Battery (6V, 1.3Ah, 1300mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters - Walmart.com