NOCO GENIUS2
#9 in Up to 5 AFull review
A weatherproof maintainer for motorcycles, ATVs and cars in storage that also handles lithium batteries. Owners of big truck or RV batteries should step up to a GENIUS5 or GENIUS10.
Amazon $49.95$49.95
The NOCO GENIUS2 is the better battery charger overall, rated 3.2 to 2.8. The NOCO GENIUS2 leads on value, features and charge current. The Battery Tender Junior Multi-Chemistry wins on warranty. The Battery Tender Junior Multi-Chemistry costs $7.46 less ($42.49 vs $49.95).
Battery Tender Junior Multi-Chemistry
#13 in Up to 5 AFull review
The pick for riders with a lithium motorcycle or powersport battery who want a simple, small maintainer for storage.
Amazon $42.49$42.49
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 NOCO GENIUS2 for value ($24.98 per amp ($49.95, 2 A) vs $42.49 per amp ($42.49, 1 A)), features (lithium mode, temperature compensation, repair mode vs lithium mode, temperature compensation) and charge current (2 A vs 1 A).
- Choose the Battery Tender Junior Multi-Chemistry for warranty (5-year warranty vs 3-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 5 A battery charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | NOCO GENIUS2 | Battery Tender Junior Multi-Chemistry |
|---|---|---|
| Overall rating | 3.2/5 | 2.8/5 |
| Value 35% | 43 $24.98 per amp ($49.95, 2 A) | 17 $42.49 per amp ($42.49, 1 A) |
| Charge current 20% | 25 2 A | 0 1 A |
| Features 25% | 75 lithium mode, temperature compensation, repair mode | 50 lithium mode, temperature compensation |
| Warranty 20% | 50 3-year warranty | 100 5-year warranty |
Specifications
| NOCO GENIUS2 | Battery Tender Junior Multi-Chemistry | |
|---|---|---|
| Charging | ||
| Charge current | 2 A | 1 A |
| Voltage | 6/12 V | 12 V |
| Largest battery | 40 Ah | 30 Ah |
| Lithium mode | Yes | Yes |
| AGM mode | Yes | No |
| Temperature compensation | Yes | Yes |
| Repair mode | Yes | No |
| Power supply mode | No | No |
| Build | ||
| Ingress rating | IP65 | - |
| Weight | 1.1 lb | 0.7 lb |
| Warranty | 3 years | 5 years |
| Released | 2019-11-08 | 2017-02-06 |