Battery Chargers · Head-to-head
Battery Tender 021-0128 vs Battery Tender 022-0148-DL-WH
Best for Long-Term Car Storage (10-Year Warranty)
Battery Tender 021-0128
8.2/10
$58.95 at Amazon
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Best Multi-Battery Charger
Battery Tender 022-0148-DL-WH
7.8/10
$184.99 at Amazon
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The short answer
Battery Tender 021-0128 comes out ahead overall with 8.2/10 against 7.8/10 for the Battery Tender 022-0148-DL-WH. Battery Tender 021-0128 is stronger on ease of use & hookup, durability, weather & cold resistance, safety, certifications & energy and value. Battery Tender 022-0148-DL-WH is stronger on battery compatibility. At current verified prices, the Battery Tender 021-0128 costs about $126.04 less.
- Choose the Battery Tender 021-0128 if: Owners storing a 12V lead-acid car, motorcycle or ATV battery (14–80Ah) every winter who want a proven float maintainer that lasts for years.
- Choose the Battery Tender 022-0148-DL-WH if: Collectors or households storing three or four 12V vehicles at once from one outlet.
Scores by criterion
| Criterion | Battery Tender 021-0128 | Battery Tender 022-0148-DL-WH |
|---|---|---|
| Long-term maintenance performance | 8.6A proven 4-step float maintainer; manufacturer says it initializes from 2V (testers report about 3V). | 8.5Each bank runs its own float maintenance, so one bad battery doesn't affect the others. |
| Battery compatibility | 6.812V lead-acid only, 14–80Ah; no 6V and no lithium. | 7.5Four 12V batteries; Amazon lists LiFePO4, but the manufacturer states lithium support inconsistently; no 6V. |
| Ease of use & hookup | 8.512 ft total reach and a quick-disconnect ring harness make permanent hookup simple; Reviewed calls the cable short. | 7.8One outlet for four vehicles, with an LED per bank. |
| Durability, weather & cold resistance | 8.8Metal housing and a class-leading 10-year warranty; no IP rating published. | 7.5IP65, but only a 2-year warranty. |
| Safety, certifications & energy | 8.8ETL/cETL safety listing plus CEC/DOE efficiency compliance, confirmed on Battery Tender's own page. | 8.5ETL/cETL listed and CEC/DOE compliant (manufacturer page). |
| Value | 7.8$58.95 is a little high for 1.25A, but the 10-year warranty makes up for it. | 6.8Expensive up front, reasonable per bank; stock is volatile. |
Specifications
| Spec | Battery Tender 021-0128 | Battery Tender 022-0148-DL-WH |
|---|---|---|
| Max charge current | 1.25 A | 1.25 A |
| Battery voltages | 12V | 12V |
| Battery chemistries | Flooded, AGM, gel, sealed maintenance-free lead-acid | Flooded, AGM, gel lead-acid; lithium listed in specs (inconsistent) |
| Lithium (LiFePO4) mode | No | Yes |
| Max rated battery capacity | 80 Ah | — |
| Charging banks | 1 banks | 4 banks |
| Charges deeply discharged (<1V) batteries | Yes | — |
| Ingress protection | — | IP65 |
| Warranty | 10 years | 2 years |
| Safety / efficiency certifications | ETL & cETL; FCC, ICES, CEC, DOE | ETL & cETL; FCC, ICES, CEC, DOE |
| Power source | AC wall outlet | AC wall outlet |
Battery Tender 021-0128
Pros
- 10-year limited warranty
- ETL/cETL listed and CEC/DOE compliant
- Metal case with quick-disconnect harness
- Suited to cars, motorcycles and ATVs from 14 to 80Ah
- Priced below the NOCO GENIUS5
Cons
- 12V lead-acid only
- Slow on a deeply drained battery
- Short cable, per Reviewed
- No temperature compensation or IP rating listed
A dependable, long-warranty choice for anyone who stores a 12V lead-acid battery every winter.
Full Battery Tender 021-0128 review →Battery Tender 022-0148-DL-WH
Pros
- Four independent 1.25A banks
- IP65 housing
- ETL/cETL listed, CEC/DOE compliant
- One outlet for a whole garage
- Recommended by Road & Track and The Drive
Cons
- Expensive overall, about $46 per bank
- Only a 2-year warranty
- Lithium support stated inconsistently
- Often sold out
A good fit for collectors and multi-vehicle households, and overkill for everyone else.
Full Battery Tender 022-0148-DL-WH review →Both products are part of our guide The Best Battery Maintainers / Trickle Chargers for Winter Storage of 2026, where you can see every pick, how we score and current prices from each retailer.