Battery Tender Plus vs Noco Genius5: Which One Should You Buy?
Battery Tender Plus and NOCO GENIUS5 chargers compared on output current, voltage range, battery types, cables and warranty, with a verdict on which side fits which mower battery.
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Top picks at a glance
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- 1
Battery Tender Plus 12V 1.25 Amp Charger9.7/10View on Amazon - 2
NOCO GENIUS5 5A 6V and 12V Smart Battery Charger9.7/10View on Amazon - 3
Battery Tender Plus 12V 1.25 Amp Charger9.5/10View on Amazon
Verdict: Choose a battery tender plus if you want the longest stated warranty here and a 12V maintainer with ring terminal and alligator clip cables. Choose a noco genius5 if you want higher output current, 6V and 12V support, lithium batteries and a desulfator.
A mower battery that sits through the off season is the part most likely to greet spring dead. The battery tender plus vs noco genius5 question comes down to what you charge and how you want to maintain it. This comparison covers Battery Tender Plus and NOCO GENIUS5 examples from the listings we reviewed.
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Battery Tender Plus 12V 1.25 Amp Charger, Ring Terminal and Clips
A 12V 1.25 AMP battery charger and maintainer with a 4-Step Charging Program, ring terminal and alligator clip cables, and a 10-year manufacturer's warranty.
Read the full review
The Battery Tender 021-0128 example is the 12V side of this comparison: a 1.25 AMP charger and maintainer with a 4-Step Charging Program, adaptive smart charging, a two-color LED charge status and a quick disconnect harness. The listing names automotive, motorcycle, lawn mower and ATV use, and includes a fused ring terminal and alligator clip accessory cables.
Pros
- 10-year manufacturer's warranty stated
- 4-Step Charging Program with float maintenance
- Fused ring terminal and alligator clip cables included
- Two-color LED charge status stated
Cons
- 12V only, no 6V support stated
- 1.25 AMP output, lower than the 5A example
- No lithium battery support stated
- No desulfator or force mode stated
NOCO GENIUS5 5A 6V and 12V Smart Battery Charger
A 5A 6V and 12V smart battery charger and maintainer with a desulfator, temperature compensation, force mode and a 3-year warranty.
Read the full review
The NOCO GENIUS5 example is the higher-output side: a 5A smart charger for 6V and 12V lead-acid and lithium LiFePO4 batteries, with a desulfator, an integrated thermal sensor for temperature compensation and a force mode for completely dead batteries. The box includes a 72-inch AC cable, an 80-inch DC cable with battery clamps, integrated eyelet terminals, a mounting bracket and screws.
Pros
- 5A output current stated
- 6V and 12V support including lithium LiFePO4
- Desulfator with temperature compensation and force mode
- 72-inch AC cable and 80-inch DC cable with clamps and eyelet terminals
Cons
- 3-year warranty, shorter than the 10-year example
- Tallest of the three examples at 7.95 in high
- No quick disconnect harness stated
- Charge time of 8 hours is stated, with no battery size named
Battery Tender Plus 12V 1.25 Amp Charger, 022-0185G Model
A 12V 1.25 AMP battery charger and maintainer with float mode for long-term storage, for AGM and flooded batteries.
Read the full review
The Battery Tender 022-0185G example is the second 12V side: a 1.25 AMP charger and maintainer that provides a full charge before switching to float mode to maintain voltage levels for long-term storage. The listing names AGM and flooded batteries and includes ring terminal and alligator clip cables, and states a charge time of 2 hours.
Pros
- Float mode for long-term storage without overcharging
- AGM and flooded battery support stated
- Ring terminal and alligator clip cables included
- California compliant charger stated
Cons
- No warranty term stated, only Manufacturer Warranty
- No 6V or lithium support stated
- No desulfator or force mode stated
- 2 pounds, heaviest of the three examples
battery tender plus vs noco genius5 side by side
| Factor | Battery Tender Plus (021-0128) | NOCO GENIUS5 | Battery Tender Plus (022-0185) |
|---|---|---|---|
| Output current | 1.25 AMP | 5A | 1.25 A |
| Battery voltage | 12V | 6V and 12V | 12V |
| Battery types | 12V battery, chemistry not stated | Lead-acid and lithium LiFePO4 | AGM and flooded |
| Charging features | 4-Step Charging Program, two-color LED | Desulfator, temperature compensation, force mode | Float mode |
| Cables and connectors | Fused ring terminal, alligator clips, quick disconnect harness | 72-inch AC cable, 80-inch DC cable, clamps, eyelet terminals | Ring terminal, alligator clips |
| Weight | 1.5 pounds | 1.6 pounds | 2 pounds |
| Warranty | 10-year manufacturer’s warranty | 3-year warranty | Manufacturer warranty, no term stated |
| Listings stated | CE, ETL, FCC | CEC, FCC, UL | CEC, ETL, FCC |
Figures are manufacturer stated for the example models, collected 25 October 2026.
Output current and battery voltage
Output current is the clearest stated split. Both Battery Tender Plus examples list 1.25 AMP, while the NOCO GENIUS5 example lists 5A. Voltage splits the same way: both Battery Tender Plus examples list 12V only, while the NOCO example lists 6V and 12V. Neither side wins on charge time alone: the second Battery Tender Plus example states a charge time of 2 hours and the NOCO example states 8 hours, but neither listing names the battery size behind its figure, so the two times are not a direct comparison.
Battery types and charging features
The first Battery Tender Plus example lists a 4-Step Charging Program and names automotive, motorcycle, lawn mower and ATV use, with a two-color LED charge status. The second Battery Tender Plus example lists float mode for long-term storage and names AGM and flooded batteries. The NOCO example covers more battery types in its listing: lead-acid and lithium LiFePO4, with a desulfator, temperature compensation and a force mode that the listing says charges batteries from as low as 1 volt, or down to zero volts in force mode. Neither Battery Tender Plus listing states lithium support, a desulfator or a force mode.
What comes in the box and warranty
Cables differ by example. The first Battery Tender Plus example includes a fused ring terminal and alligator clip accessory cables with a quick disconnect harness. The second Battery Tender Plus example includes ring terminal and alligator clip cables. The NOCO example includes a 72-inch AC cable, an 80-inch DC cable with battery clamps, integrated eyelet terminals, a mounting bracket and screws. Warranty also splits the set: the first Battery Tender Plus example states a 10-year manufacturer’s warranty, the NOCO example states a 3-year warranty, and the second Battery Tender Plus example states a manufacturer warranty with no term.
The examples
Acreage and terrain fit
Battery Tender 021-0128
NOCO GENIUS5
Battery Tender 022-0185
Matching It to Your Property
- Keep the maintainer on the mower battery through storage, using the ring terminal harness where the battery stays mounted.
- Use the alligator clips for a temporary connection, and the eyelet terminals where a fixed connection suits the setup.
- Mount the NOCO unit with its bracket and screws where the charger stays in one place.
- Store the charger and cables with the mower battery so the set stays together between seasons.
The Acre Score explained
The Acre Score weighs five factors: performance (output current, voltage range and charging features), build quality (cables and connectors), value (what comes in the box), safety (certifications the listing states) and warranty (years and coverage). All three examples state an electrical listing, so all three score on safety, while the second Battery Tender Plus example states a manufacturer warranty with no term, so it scores zero on warranty.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Battery Tender 021-0128 | 9.7 | 29 | 21 | 21 | 7 | 4 |
| NOCO GENIUS5 | 9.7 | 32 | 21 | 21 | 7 | 3 |
| Battery Tender 022-0185 | 9.5 | 28 | 20 | 20 | 7 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
For a mower that sits all season, the maintainer matters as much as the battery. If the battery itself is due for replacement, see our battery charger for zero turn lawn mower guide for a related charging comparison.
Read the manual, keep children and pets out of the yard while you work, wear eye and hearing protection and sturdy footwear, and never exceed the slope rating of your machine. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
FAQ: mowing large lots
Can the NOCO GENIUS5 charge a 6V battery?
Yes. The NOCO listing states 6V and 12V support for lead-acid and lithium batteries. Neither Battery Tender Plus example states 6V support.
Do these chargers work on lithium batteries?
Only the NOCO example states lithium support, naming LiFePO4 among its battery types. Neither Battery Tender Plus listing states lithium support.
Which example states the longest warranty?
The first Battery Tender Plus example states a 10-year manufacturer’s warranty. The NOCO example states a 3-year warranty, and the second Battery Tender Plus example states a manufacturer warranty with no term.
Can these chargers recover a dead battery?
The NOCO listing states charging from as low as 1 volt, and force mode for completely dead batteries down to zero volts. Neither Battery Tender Plus listing states a dead-battery recovery mode.
What cables come with each charger?
The first Battery Tender Plus example includes a fused ring terminal and alligator clip cables. The second includes ring terminal and alligator clip cables. The NOCO example includes a 72-inch AC cable and an 80-inch DC cable with battery clamps, plus integrated eyelet terminals.
