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CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658

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CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658

$129.00
SKU: NXT5
Availability: Shipping Lead Time is 24 to 48 Hours
Shipping: Free shipping on orders $75 and up
Charge Rate: 5A
Charging Modes: WET, MF, Ca/Ca, AGM, EFB, GEL, and LiFePO₄
Battery Capacity (Charging): 1.2–110 Ah
Battery Capacity (Maintenance): Up to 160 Ah
Warranty: 5 Years
CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658

CTEK NXT 5 Smart 12V Battery Charger & Maintainer | 40-658

$129.00
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Description  

CTEK NXT 5 — Smart 12V Battery Charger & Maintainer

Part #: 40-658  |  4.3A Output  |  Lead Acid & Lithium  |  IP65  |  5-Year Warranty

The CTEK NXT 5 is the next generation of smart 12V battery charging — built tough, designed smart, and loaded with award-winning Swedish engineering. Whether you're maintaining a daily driver, storing a seasonal vehicle, or keeping a motorcycle battery healthy all winter, the NXT 5 delivers 8-step fully automatic charging, patented reconditioning modes, and AGM optimization in a compact, IP65-rated package that handles extreme weather without breaking a sweat.

⚡ Is the NXT 5 the Right Charger for You?

  • You store a car, motorcycle, boat, or seasonal vehicle and need reliable maintenance charging
  • Your battery is deeply discharged or showing signs of sulfation
  • You have an AGM battery in a Start/Stop vehicle
  • You want to charge both lead-acid and lithium (LiFePO₄) batteries with one charger
  • You need weatherproof, garage-ready charging you can leave connected and forget

Not sure which charger is right? Browse our charger selection or call 1-800-237-6126.

What Makes the NXT 5 Different

Feature What It Means for You
8-Step Automatic Cycle Fully automated — just connect and walk away. No manual modes or guesswork.
Patented Recond & Desulphation Restores deeply discharged and sulfated batteries that other chargers won't touch — starting at just 2.0V.
AGM Optimisation Mode Purpose-built charging profile for AGM Start/Stop batteries to extend their service life.
Lead Acid + Lithium Compatible Supports WET, MF, Ca/Ca, AGM, EFB, GEL, and LiFePO₄ — one charger for your whole fleet.
Temperature Compensation Automatically adjusts charge voltage from -4°F to +122°F — reliable in cold garages and hot climates alike.
Battery Analysis on Every Cycle Select your mode and the NXT 5 analyses the battery first — small motorcycle batteries get gentle charging to prevent overheating; large car batteries get the full 4.3A for faster results.
LED Display + Status Indicators Clear indicators show charging stage at a glance — green power light, red error alert, and 8-step progress display so you always know what the charger is doing.
IP65 Weatherproof + Spark-Free Dust-tight and water-resistant with reverse polarity protection — safe to use in any environment.
Recond Mode Usage Tip Recond mode is a deep-restore treatment for WET and Ca/Ca batteries — CTEK recommends using it a maximum of once or twice a year for best results.

Technical Specifications

Specification Value
Input 110–120 VAC, 50–60 Hz, 1.1A
Output 14.4 / 14.7 / 15.8V, 4.3A
Charger Type 8-Step, Fully Automatic
Battery Voltage 12V
Supported Battery Types WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO₄
Battery Capacity (Charging) 1.2–110 Ah
Battery Capacity (Maintenance) Up to 160 Ah
Minimum Start Voltage 2.0V
Operating Temperature -4°F to +122°F (-20°C to +50°C)
Degree of Protection IP65 (Dust-tight, Water-resistant)
Current Ripple Less than 4%
Includes Connect U-terminal (for permanent battery connection)
Warranty 5 Years

? Perfect For:

✓ Cars & trucks (daily drivers & storage) ✓ Motorcycles & powersports ✓ Seasonal vehicles (boats, ATVs, RVs) ✓ Start/Stop AGM battery systems ✓ Lithium LiFePO₄ battery packs ✓ Long-term maintenance up to 160 Ah ✓ Lawn & garden equipment batteries

Have a Question? We Know Batteries — Ask Us.

Call toll-free 1-800-237-6126 or contact us online — we'll help you choose the right charger for your application.

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