Defender Winch Battery Extension Cables - Heavy Duty - British Made + Isolator 4mWinch Power Cable Extension Kit. Designed to fit Land Rover Defender Includes Battery Isolator The battery in most Landrover Defenders is located under the passenger seat and not in the engine bay. The industry standard winch power cable length of 1. 8m and not long enough to reach so needs to be extended. One of the most common problems we hear of is where power cables have been extended using inadequate cable or low grade jump lead cable. This