Battery Tender 15 A Charger
#3 in Over 5 AFull review
A fast, simple charger for owners of cars, trucks and boats who want to recharge flat 12 V batteries quickly with a long warranty.
Amazon $106$106
The Battery Tender 15 A Charger is the better battery charger overall, rated 3.8 to 2.9. The Battery Tender 15 A Charger leads on value. The Battery Tender 15 A Charger costs $271.08 less ($106 vs $377.08).
CTEK NXT 15
#12 in Over 5 AFull review
A high end 15 A charger and supply for owners of big 12 V batteries in trucks, RVs and boats who want lithium support.
Amazon $377.08$377.08
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Battery Tender 15 A Charger for value ($7.07 per amp ($106, 15 A) vs $25.14 per amp ($377.08, 15 A)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 5 A battery charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Battery Tender 15 A Charger | CTEK NXT 15 |
|---|---|---|
| Overall rating | 3.8/5 | 2.9/5 |
| Value 35% | 72 $7.07 per amp ($106, 15 A) | 9 $25.14 per amp ($377.08, 15 A) |
| Charge current 20% | 41 15 A | 41 15 A |
| Features 25% | 50 features not published (neutral score used) | 75 lithium mode, temperature compensation, power supply mode |
| Warranty 20% | 100 5-year warranty | 50 warranty not published (neutral score used) |
Specifications
| Battery Tender 15 A Charger | CTEK NXT 15 | |
|---|---|---|
| Charging | ||
| Charge current | 15 A | 15 A |
| Voltage | 12 V | 12 V |
| Largest battery | - | 350 Ah |
| Lithium mode | - | Yes |
| AGM mode | Yes | - |
| Temperature compensation | - | Yes |
| Power supply mode | - | Yes |
| Build | ||
| Warranty | 5 years | - |
| Released | 2020-06-01 | 2025-11-20 |