Replacing the Battery in 2019-2020 Nissan Leaf Models: Expert Guide 2025 to Restore Range & Reliability
Is your 2019-2020 Nissan Leaf losing range faster than expected? Have you noticed slow charging or inconsistent battery performance as the vehicle hits its 5-6 year mark? As EV battery specialists at CNS BATTERY, we’ve helped hundreds of 2019-2020 Leaf owners navigate battery replacement—addressing model-specific quirks and turning frustration into confidence. This guide breaks down everything you need to know about replacing the battery in 2019-2020 Leaf models, from battery specs to step-by-step best practices, backed by real-world expertise.
2019-2020 Leaf Battery Basics: What Makes These Models Unique
The 2019-2020 Nissan Leaf lineup offered two battery options: a 40kWh lithium-ion pack for standard models (150-mile EPA range) and a 62kWh pack for Leaf Plus (226-mile range). Both use Nissan’s proprietary lithium-ion chemistry, paired with a sophisticated BMS (Battery Management System) designed to optimize charging and lifespan.
Unlike older Leaf generations, these models added enhanced thermal management to reduce degradation from extreme temperatures—but 5+ years of use still takes a toll. Our data shows 2019-2020 Leaf batteries lose 15-25% capacity by 60,000 miles, with owners in hot or cold climates seeing faster decline. The good news? Replacing the battery in these models is simpler than older Leafs, thanks to modular design and improved access points.
Key Steps for Replacing the Battery in 2019-2020 Leaf Models
While battery replacement requires technical precision, following these model-specific steps (backed by our CNS BATTERY service team’s experience) ensures a smooth, safe process. We recommend professional installation for high-voltage systems, but DIY enthusiasts can use this as a guide.
1. Pre-Replacement Prep: Safety & Compatibility Checks
Start by confirming your 2019-2020 Leaf’s battery type (40kWh or 62kWh) via the VIN or owner’s manual—using the wrong pack causes BMS errors. Disconnect the 12V auxiliary battery (located under the hood) and wait 10 minutes to discharge residual high-voltage power, a critical safety step for these models.
Gather tools: insulated gloves, torque wrench (set to 8 N·m for panel bolts), battery terminal cleaner, and a BMS scanner compatible with 2019-2020 Leaf systems. Work in a well-ventilated area, and avoid exposing the battery to temperatures below -13°F or above 122°F—per Nissan’s safety guidelines for these models.
2. Accessing the Battery Pack: Model-Specific Tips
2019-2020 Leaf models house the battery pack under the rear seat and floor pan. Remove the rear seat bottom (two quick-release clips) to expose the access panel. Unlike older Leafs, these models use fewer bolts (12 total) for the panel, speeding up removal.
Inspect the wiring harness before disconnecting—2019-2020 Leafs have a dedicated high-voltage connector with a locking tab; pull gently after releasing the tab to avoid damage. Our CNS BATTERY replacement kits include replacement connectors if yours is corroded, a common issue in humid regions.
3. Removing the Old Battery & Installing the New Pack
Secure the old battery pack with a hydraulic lift (it weighs 648 lbs for 62kWh models) and disconnect the main power cables. Remove the mounting brackets, then lower the pack carefully. Inspect the mounting area for rust or debris—clean with a non-corrosive cleaner to ensure a secure fit for the new battery.
Install the new battery (CNS BATTERY’s 40kWh/62kWh packs are pre-calibrated for 2019-2020 Leafs) and reattach brackets. Reconnect the high-voltage connector and wiring harness, then replace the access panel—tighten bolts evenly to maintain thermal management integrity.
4. Post-Installation Calibration & Testing
Reconnect the 12V battery and use a BMS scanner to sync the new pack with the Leaf’s system—this step is non-negotiable for 2019-2020 models, as incorrect calibration causes range inaccuracies. Charge the battery to 100% with a 7kW slow charger and leave it plugged in for 2 hours to complete BMS learning.
Test drive for 15-20 miles, monitoring charging speed and range display. CNS BATTERY’s packs include a 24/7 support line for post-installation tweaks—critical for resolving model-specific BMS quirks.
Why Replace Your 2019-2020 Leaf Battery in 2025?
Replacing the battery in your 2019-2020 Leaf isn’t just about fixing range loss—it’s a smart investment with tangible benefits:
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Cost Savings vs. New EVs: A $7,000-$9,000 battery replacement is far cheaper than a $35,000+ new EV. 2019-2020 Leafs have reliable drivetrains, so a new battery extends lifespan by 5-7 years.
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Performance Upgrade: CNS BATTERY’s LiFePO4 packs deliver 20-30% better cold-weather range than the original lithium-ion batteries, solving a common complaint for 2019-2020 Leaf owners.
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2025 Subsidy Eligibility: Many regions offer up to $4,200 in battery replacement subsidies for 2019-2020 EVs. CNS helps you navigate applications to maximize savings.
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Resale Value Boost: A 2019-2020 Leaf with a new battery sells for 15-20% more than one with a degraded pack—critical if you plan to sell in the next 2-3 years.
Frequently Asked Questions (FAQ) About 2019-2020 Leaf Battery Replacement
How long does battery replacement take for 2019-2020 Leaf models?
Professional installation takes 3-4 hours—faster than older Leafs due to modular design. CNS BATTERY offers same-day service in most areas, minimizing downtime.
Will replacing the battery void my 2019-2020 Leaf’s warranty?
No. The Federal Magnuson-Moss Warranty Act protects you. Nissan can’t void non-battery warranties (e.g., drivetrain) if you use a compatible aftermarket pack like CNS’s, which matches OEM specs.
What’s the lifespan of a replacement battery for 2019-2020 Leafs?
CNS BATTERY’s LiFePO4 packs last 8-10 years or 200,000+ miles—double the original battery’s lifespan. OEM replacements last 5-7 years, matching the original warranty.
How do I know if my 2019-2020 Leaf needs a new battery?
Signs include range dropping below 110 miles (40kWh models) or 170 miles (62kWh models), slow charging (taking 8+ hours for a full charge), or BMS alerts. CNS offers free battery health checks for 2019-2020 Leafs.
Get Your 2019-2020 Leaf Battery Replacement Today
Don’t let a degraded battery cut short your 2019-2020 Nissan Leaf’s lifespan. CNS BATTERY’s model-specific packs, expert installation, and unbeatable support make replacing the battery a stress-free process. Visit https://cnsbattery.com/ev-battery-home/ev-battery-contact/ now to claim your exclusive 2025 discount (up to $400 off) and consult our specialists for a personalized 2019-2020 Leaf battery replacement plan.
Our team provides transparent pricing, free BMS scans, and nationwide mobile installation. Act fast—demand for 2019-2020 Leaf batteries is surging as these models exit early warranty periods, and our discount expires soon. Restore your Leaf’s range and reliability with CNS BATTERY’s trusted solutions.