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 3.6. The Battery Tender 15 A Charger leads on value and warranty. The NOCO GENIUSPRO25 wins on charge current. The Battery Tender 15 A Charger costs $493.95 less ($106 vs $599.95).
NOCO GENIUSPRO25
#7 in Over 5 AFull review
A professional bench charger and power supply for shops and fleet owners working on 12 V and 24 V vehicles. Home users get most of the benefit from a GENIUS10 for a fraction of the price.
Battery Mart $599.95$599.95
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 $24 per amp ($599.95, 25 A)) and warranty (5-year warranty vs 3-year warranty).
- Choose the NOCO GENIUSPRO25 for charge current (25 A vs 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 | NOCO GENIUSPRO25 |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Value 35% | 72 $7.07 per amp ($106, 15 A) | 11 $24 per amp ($599.95, 25 A) |
| Charge current 20% | 41 15 A | 100 25 A |
| Features 25% | 50 features not published (neutral score used) | 100 lithium mode, temperature compensation, repair mode, power supply mode |
| Warranty 20% | 100 5-year warranty | 50 3-year warranty |
Specifications
| Battery Tender 15 A Charger | NOCO GENIUSPRO25 | |
|---|---|---|
| Charging | ||
| Charge current | 15 A | 25 A |
| Voltage | 12 V | 6/12/24 V |
| Largest battery | - | 1,000 Ah |
| Lithium mode | - | Yes |
| AGM mode | Yes | - |
| Temperature compensation | - | Yes |
| Repair mode | - | Yes |
| Power supply mode | - | Yes |
| Build | ||
| Ingress rating | - | IP20 |
| Weight | - | 2.7 lb |
| Warranty | 5 years | 3 years |
| Released | 2020-06-01 | 2020-12-08 |