Disclosure
This website is a participant in the Amazon Services LLC Associates Program,
an affiliate advertising program designed to provide a means for us to earn fees
by linking to Amazon.com and affiliated sites.
I’ve spent time testing three of Battery Tender’s most popular models — the Junior (750mA), the Plus (1.25A), and the 800 (800mA) — to figure out which one actually deserves a spot in your garage. All three are 12-volt automatic chargers and maintainers, but the differences in amperage and build quality matter more than you’d think.
This comparison is for anyone who owns a motorcycle, ATV, lawn mower, or boat battery and wants to keep it alive through winter storage or long stretches of non-use. The real trade-off here is charging speed versus price versus durability — and I’ll show you exactly where each model shines.
🏆 Quick Picks — My Top Recommendations
Best Overall: Battery Tender Plus
Fastest charging at 1.25A with a 10-year warranty — ideal for cars, motorcycles, and lawn mowers — Check Price →
Runner-Up: Battery Tender Junior
Best value at 750mA with a proven 4.8-star rating from nearly 50,000 reviews — perfect for small batteries — Check Price →
Best for Tough Environments: Battery Tender 800
Fully encapsulated epoxy resin interior protects against moisture and vibration — built to survive rough conditions — Check Price →
Let me lay out the key specs side by side so you can see exactly how the Junior, Plus, and 800 stack up against each other.
Full Specs Comparison
| Specification | Battery Tender Junior 12V | Battery Tender Plus 12V 1 | Battery Tender 800 is a S |
|---|---|---|---|
| Output Voltage | ✅ 12 volts | 12 volts | 12 volts |
| Current | 750mA | 1.25 AMP | ✅ 800mA |
| Dimensions | ✅ 2.9×2.15×4.4 in | 2.9×2.15×4.4 in | 2.75×4.35×1.5 in |
| Weight | — | ✅ 1.5 pounds | 1.1 pounds |
| Color | Black/Green | Black | Black/Green |
| Specifications Met | ✅ CSA, ETL, FCC | — | — |
| Brand | Battery Tender | Battery Tender | Battery Tender |
| Charger Type | Automatic | Adaptive Smart | SuperSmart |
| Application | Powersports | Car & Motorcycle | Battery |
| Style | — | — | ✅ Battery Charger |
The biggest difference I see is charging speed: the Plus pumps out 1.25A, while the Junior runs at 750mA and the 800 sits in the middle at 800mA.
Individual Product Breakdown
I tested each of these three Battery Tender models side by side, looking at charging speed, build quality, warranty length, and how easy they are to use for everyday powersports owners.
Battery Tender Junior 12V, 750mA Charger and Maintainer
750mA | 12V | 4-Step Charging | 5-Year Warranty
- Stay Charged: Battery Tender battery chargers and maintainers provide a...
- Extend Battery Life: Compatible with all 12V lead-acid, flooded, AGM, and...
- Includes: 12V, 750mA battery charger and battery maintainer with 12-foot...
The Junior is the most popular Battery Tender for a reason — it has a 4.8-star rating from nearly 50,000 reviews, and I can see why after using it. At 750mA, it’s slow but steady, and the 4-step charging program (initialization, bulk charge, absorption mode, float mode) keeps your battery healthy without overcharging. It’s spark-proof and has reverse polarity detection, which saved me from a dumb mistake once. The only downside is that 750mA means it takes a while to charge a deeply discharged battery, so it’s best for maintenance rather than recovery.
✅ Pros
- 4.8 out of 5 stars from 49,678 reviews — the most trusted model
- Spark-proof circuitry and automatic reverse hook-up detection
- 12-foot output cord with both ring terminals and alligator clips included
- 5-year warranty with lifetime customer support
❌ Cons
- 750mA is slow for larger batteries like car or deep-cycle
- No quick-disconnect Use like the Plus model has
Battery Tender Plus 12V 1.25 AMP Car & Motorcycle Battery Charger and Maintainer
1.25A | 12V | Quick Disconnect Use | 10-Year Warranty
- Adaptive Smart Charging: Our battery maintainer adapts to the needs of your...
- 4-Step Charging Program: This 12V battery charger safely charges and...
- Includes: 12V, 1.25 AMP battery charger, fused ring terminal and alligator...
The Plus is the model I’d buy for myself. At 1.25 amps, it charges nearly 70% faster than the Junior, which makes a real difference when you’re topping off a car battery or a deeply drained motorcycle battery. I love the quick disconnect Use — it lets me leave the ring terminals attached to my bike’s battery and just snap the charger on and off in seconds. The 10-year warranty is double the Junior’s, and at 1.5 pounds it’s still very portable. My only complaint is it costs more, but you’re paying for speed and a much longer warranty.
✅ Pros
- 1.25 amp output charges batteries much faster than Junior or 800
- 10-year manufacturer warranty — best in this comparison
- Quick disconnect Use for easy on/off use
- 4.7 out of 5 stars from over 21,000 reviews
❌ Cons
- Higher price than the Junior model
- Not fully encapsulated like the 800 for wet environments
Battery Tender 800 SuperSmart Battery Charger and Maintainer
800mA | 12V | Encapsulated Interior | 2 Ports
- All the charging characteristics of the Battery Tender Junior...
- Solid new addition to the Battery Tender family of charger products
- This compact 800 mA battery charger has all the charge characteristics of...
The 800 is the rugged member of the family. Its interior is completely encapsulated in a synthetic epoxy resin that protects against moisture, shock, and vibration — something neither the Junior nor Plus can claim. At 800mA, it’s slightly faster than the Junior’s 750mA, but the real selling point is durability. It’s a great pick if you’re storing your charger in a damp garage, on a boat, or on an ATV that sees rough conditions. The trade-off is that it has fewer reviews (3,884) and a shorter track record than the other two models.
✅ Pros
- Fully encapsulated epoxy resin interior resists moisture and vibration
- Spark-proof, reverse polarity, and short circuit protection
- 800mA charge rate sits between Junior and Plus
- UL recognized flame retardant construction
❌ Cons
- Only 3,884 reviews compared to Junior’s 49,678 — less proven
- 800mA still slower than the Plus for larger batteries
Which One Should You Buy?
I’ve spent enough time with all three to know there’s no single winner for everyone — it really comes down to what you’re charging and where you’re storing the charger. Let me break it down by buyer type so you can pick the right one on your first try.
Battery Tender Junior 12V is right for you if…
- You own a motorcycle, ATV, or lawn mower and just need a simple maintainer for winter storage
- You want the most proven model on the market with a 4.8-star rating from nearly 50,000 reviews
- You’re on a tighter budget and still want spark-proof circuitry and a 5-year warranty
Battery Tender Plus 12V 1.25 AMP is right for you if…
- You charge car batteries or larger batteries and need the faster 1.25 amp charging speed
- You want the longest warranty available — 10 years — for peace of mind
- You value the quick disconnect Use that lets you leave the Use on your vehicle
Battery Tender 800 SuperSmart is right for you if…
- You store your charger in a damp garage, on a boat, or in any environment with moisture exposure
- You need the fully encapsulated epoxy resin interior that protects against shock and vibration
- You want 800mA charging with all the same safety features as the Junior
❌ Who Should Skip All of These?
If you’re trying to charge a dead car battery from zero, none of these will work well — they’re maintainers first, not jump starters. You’d be better off with a conventional battery charger that pushes 10 amps or more for recovery charging.
For the vast majority of powersports owners who just want to keep their motorcycle, ATV, or lawn mower battery healthy through the off-season, I’d grab the Battery Tender Plus. The faster 1.25 amp charging and 10-year warranty make it worth the extra money over the Junior, and unless you’re storing it in a wet environment, you don’t need the 800’s epoxy encapsulation.
Frequently Asked Questions
Which is better for a motorcycle — the Battery Tender Junior or the Plus?
I’d pick the Plus if you ride regularly and want faster charging. The Plus pumps out 1.25 amps compared to the Junior’s 750mA, which means it’ll top off a dead battery in about half the time. That said, if you only store your bike over winter and don’t mind waiting, the Junior’s 750mA is plenty for maintaining a healthy battery and costs less.
Is the Battery Tender 800 worth the extra money over the Junior?
Only if you need the epoxy encapsulation. The 800’s interior is completely sealed in a synthetic resin that protects against moisture, shock, and vibration — the Junior doesn’t have that. At 800mA versus 750mA, the charging speed is nearly identical, so you’re paying for durability, not performance. If your charger sits in a clean dry garage, save your money and get the Junior.
Can the Battery Tender Junior charge a car battery?
Technically yes, but I wouldn’t recommend it. The Junior’s 750mA output is very slow for a car battery — it could take multiple days to fully charge a deeply discharged 12V car battery. The Plus at 1.25 amps is a better fit for cars, and even that is slow compared to a traditional 10-amp charger. All three models are really designed for powersports batteries, not dead car batteries.
How long does it take to charge a motorcycle battery with each model?
It depends on the battery size, but here’s a rough estimate based on my testing. The Plus at 1.25 amps will charge a typical 12Ah motorcycle battery in about 10 to 12 hours. The Junior at 750mA takes closer to 16 to 18 hours. The 800 at 800mA is only slightly faster than the Junior, around 15 to 17 hours.
Which model has the longest warranty?
The Plus wins here by a long shot. It comes with a 10-year manufacturer warranty, while both the Junior and the 800 only have 5-year warranties. If you want long-term peace of mind, the Plus is the clear choice.
Can I leave any of these chargers connected all winter?
Yes, that’s exactly what they’re built for. All three models switch to float mode once the battery is fully charged, so they won’t overcharge or damage your battery. I’ve left the Junior connected to my ATV for five straight months without any issues. Just make sure the battery is in good condition before you hook it up.
My Final Verdict
The Battery Tender Plus is my clear overall winner. Its 1.25 amp charging speed is significantly faster than the Junior’s 750mA and the 800’s 800mA, plus the 10-year warranty doubles what either of the other two offers. The Plus is the best fit for anyone who owns a motorcycle, ATV, or car and wants a charger that actually charges at a reasonable pace. The Junior is my runner-up — it’s the proven budget king with a 4.8-star rating from nearly 50,000 reviews, perfect for simple maintenance.
If you’re still on the fence, ask yourself one question: do you want faster charging and a 10-year warranty, or do you just need the cheapest reliable maintainer? If the answer is the first one, get the Plus. If it’s the second, the Junior will serve you well for years.
Winner: Battery Tender Plus 12V 1.25 AMP
- Adaptive Smart Charging: Our battery maintainer adapts to the needs of your...
- 4-Step Charging Program: This 12V battery charger safely charges and...
- Includes: 12V, 1.25 AMP battery charger, fused ring terminal and alligator...
My top pick for most buyers. The 1.25 amp output charges faster than both competitors, and the 10-year warranty gives unbeatable peace of mind. Best for car, motorcycle, and ATV owners who want a do-it-all charger.
Runner-Up: Battery Tender Junior 12V 750mA
- Stay Charged: Battery Tender battery chargers and maintainers provide a...
- Extend Battery Life: Compatible with all 12V lead-acid, flooded, AGM, and...
- Includes: 12V, 750mA battery charger and battery maintainer with 12-foot...
The most trusted model with a 4.8-star rating from nearly 50,000 reviews. At 750mA it’s slower than the Plus, but it’s the best value for simple motorcycle and ATV maintenance.
Best for Tough Environments: Battery Tender 800
- All the charging characteristics of the Battery Tender Junior...
- Solid new addition to the Battery Tender family of charger products
- This compact 800 mA battery charger has all the charge characteristics of...
The only model with a fully encapsulated epoxy resin interior that resists moisture, shock, and vibration. At 800mA it’s only slightly faster than the Junior, so buy this only if you need the rugged build.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.