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Hioki BT3554-01 Battery Capacity Tester - Max Voltage: 60 V, Max Resistance (ohm): 3 Ohms, Types of Batteries Tested: Lead Acid | TEquipment
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How To Make A Battery Capacity Tester - YouTube
Battery Capacity Tester V2.0 from Open Green Energy on Tindie
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Battery Load Unit / Capacity Tester / Discharge Tester | 240 A | DV Power