Are you looking to upgrade your Nissan Leaf to a 40kWh battery for longer range and better reliability? Whether you own a 2013-2017 Gen 2 Leaf (original 24kWh/30kWh) or a 2018+ ZE1 model needing a replacement, a Nissan Leaf 40kWh upgrade delivers a transformative boost—up to 179-192 real-world miles per charge, compared to 84-107 miles with smaller packs. As CNS BATTERY’s EV experts, we’ve crafted a detailed step-by-step guide to walk you through the upgrade process, from prepping your vehicle to post-installation testing, ensuring safety, compatibility, and optimal performance.