Jump-N-Carry JNC770R1700 Peak Amp/425 Cranking Amp Premium 12 Volt Jump Starter Description. Its Clore PROFORMER battery is specifically developed to perform the jump starting application and is designed to deliver exceptional cranking power, extended cranking duration, numerous jumps per charge and long service life. Its 68 cable reach enables it to reach the starting points on vehicles of all shapes and sizes. Its new PowerJawT clamps deliver maximum power transfer and durability, thanks to their alloy core and dual molded design. A master ON/OFF switch ensures that the clamps are inactive during transportation. Jump-N-Carry JNC770R 1700 Peak Amp/425 Cranking Amp Premium 12 Volt Jump Starter. 1700 Peak Amp/425 Cranking Amp Premium 12 Volt Jump Starter.