NOCO GENIUS5
#2 in Up to 5 AFull review
The all rounder for most garages: fast enough to recover a flat car battery overnight and gentle enough to maintain a motorcycle all winter.
Amazon $69.95$69.95
3.9/5
A premium 4 A class charger and maintainer for owners who want lithium support and CTEK’s five year warranty in one compact unit.
- 4.3 ACharge current
- 12 VVoltage
- YesLithium mode
- 5 yearsWarranty
Check price at Amazon$124.99
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Lithium, AGM and recondition modes in one small charger
- Five year warranty
- IP65 housing for permanent installs in sheds and boats
- Covers batteries from 1.2 to 160 Ah, motorcycle to large car
Cons
- Costs nearly twice as much as similar 5 A chargers
- 4.3 A takes all night to refill a large flat car battery
- 12 V only
The CTEK NXT family
Every CTEK NXT model we rank, smallest first. Ratings compare each against its own current.
| Model | Charge current | Rating | Price |
|---|---|---|---|
| CTEK NXT 5 (this one) | 4.3 A | 3.9/5 | $124.99 |
| CTEK NXT 15 | 15 A | 2.9/5 | $377.08 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its current. How we rank explains each one.
Specifications
| Model number | 40-658 |
|---|---|
| Charging | |
| Charge current | 4.3 A |
| Voltage | 12 V |
| Largest battery | 160 Ah |
| Lithium mode | Yes |
| AGM mode | Yes |
| Temperature compensation | Yes |
| Repair mode | Yes |
| Build | |
| Ingress rating | IP65 |
| Weight | 1.3 lb |
| Warranty | 5 years |
| Released | 2025-11-11 |
Alternatives in this current
Schumacher Rugged SC1682
#3 in Up to 5 AFull review
A tough, weatherproof maintainer for anyone keeping lead acid or lithium batteries topped up outdoors or in a damp garage.
Amazon $59.99$59.99
CTEK MXS 5.0
#5 in Up to 5 AFull review
A proven lead acid charger and maintainer for cars and motorcycles that owners leave connected for years. Choose the NXT 5 if you have lithium batteries.
Amazon $99$99
Compare
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