TOPDON Battery Tester BT300P, 12V 24V Car Battery Tester with Printer, with Battery Test, Cranking Charging Test for 100-2000CCA Batteries, Carrying Bag, 3 Rolls of Printing Paper Included. Know everything about the health of 12V batteries, the 12V & 24V starter motor’s cranking status, and 12V & 24V vehicle electronic system’s charging condition.