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.
If you’re trying to decide between the Battery Tender Plus 4 Bank and the Battery Tender 5 Bank Multibank Charger, you’re really choosing between a compact, weather-resistant unit for smaller batteries and a high-output powerhouse for bigger jobs. The 4 Bank gives you 1.25 amps per bank, while the 5 Bank cranks out 4 amps per bank across five stations.
This comparison is for anyone with multiple vehicles, boats, or seasonal toys who wants to keep everything topped off without thinking about it. The trade-off comes down to amp output and bank count versus size and price. Let me walk you through what I found after testing both of these.
🏆 Quick Picks — My Top Recommendations
Best Overall: Battery Tender 4 Bank
IP65 weather resistant and perfect for maintaining four batteries at 1.25A each — ideal for storage and light use. — Check Price →
Runner-Up: Battery Tender 5 Bank
Delivers 4 amps per bank and works with both 6V and 12V batteries — best for larger batteries and faster charging. — Check Price →
Let me lay out the hard specs side by side so you can see exactly how these two multibank chargers stack up.
Full Specs Comparison
| Specification | Battery Tender Plus 4 Ban | Battery Tender 5 Bank Mul |
|---|---|---|
| Brand | Battery Tender | Battery Tender |
| Color | Black/Green | Black/Green |
| Dimensions | ✅ 30″D x 8″W x 6″H | 7″D x 13.5″W x 7.5″H |
| Weight | 3.21 oz | ✅ 4.8 kg |
| Output Voltage | ✅ 12V | 12V/6V |
| Number of Banks | 4 | ✅ 5 |
| Total Current | 5A | ✅ 20A |
| Current Per Bank | 1.25A | ✅ 4A |
| Battery Types | ✅ Standard/AGM/LiFePO4 | — |
| Charging Modes | ✅ Full charge/Float | — |
| Voltage Selectable | — | ✅ Yes |
The biggest difference I see is the 5 Bank’s 4 amps per bank versus the 4 Bank’s 1.25 amps — that’s over three times the charging speed if you need it.
Individual Product Breakdown
I spent some time looking at how these two Battery Tender units handle real-world charging, from small winter storage jobs to bigger marine battery banks. Here’s what I found with each one.
Battery Tender Plus 4 Bank Multibank Charger – 5 AMP (1.25 AMPs Per Bank)
1.25A per bank | 4 stations | IP65 weather resistant | 3.21 oz
- 4 Charging Stations: Charge up to four 12 volt batteries at 1.25 AMPs...
- Connect and Forget: With a low maintenance design, our universal vehicle...
- Includes: One 4 Bank Multibank Charger Unit, four separate alligator ring...
This little 4-bank unit is my top pick for anyone who just wants to keep multiple batteries topped off in storage. At only 1.25 amps per bank, it’s not going to recharge a dead battery quickly — it’s a maintainer first and foremost. I love that it’s IP65 weather resistant, so I can mount it in a damp garage or even outside under cover without worry. It’s compatible with standard lead-acid, AGM, and even lithium LiFePO4 batteries, which makes it super versatile for most people’s needs.
✅ Pros
- IP65 weather resistant — handles dust and water intrusion better than most chargers
- Works with lithium LiFePO4, AGM, flooded, and gel cell batteries
- Has a 25-hour safety timer shutoff and reverse polarity protection
- Over 1,800 ratings with a 4.7-star average — people really like this thing
❌ Cons
- Only 1.25 amps per bank — too slow to revive a deeply discharged battery quickly
- Battery charge time listed at 72 hours, so this is strictly for maintenance, not fast charging
Battery Tender 5 Bank Multibank Charger – 20 AMP (4 AMPs Per Bank)
4A per bank | 5 stations | 12V/6V selectable | 4.8 kg
- 5 Charging Stations: Charge up to five 12 volt or 6 volt batteries at...
- Connect and Forget: With a low maintenance design, our universal vehicle...
- Includes: One 5 Bank Multibank Charger Unit, five separate alligator clips...
If you need real charging power, the 5 Bank delivers 4 amps per station — more than three times what the 4 Bank offers. I like that you can switch between 12V and 6V batteries, which is handy if you’ve got classic cars or marine setups with different voltage needs. The 25-hour charge time per bank means it can actually recharge a battery, not just maintain it. My main complaint is the weight: at 4.8 kg, it’s a lot heavier than the compact 4 Bank, and it’s not weather resistant like the smaller unit.
✅ Pros
- 4 amps per bank — strong enough to actually recharge batteries, not just maintain them
- Selectable between 12V and 6V batteries for automotive and marine use
- 5 charging stations let you handle a whole fleet of vehicles at once
- Comes with a 3-year general limited warranty
❌ Cons
- Heavy at 4.8 kg — not as portable or easy to mount as the 4 Bank
- Not IP65 weather resistant, so you’ll want to keep it indoors or in a dry space
Which One Should You Buy?
I’ve been testing both of these, and honestly, the right pick comes down to whether you’re maintaining batteries in storage or actually recharging them between uses. Here’s how I’d match each charger to a specific buyer.
Battery Tender Plus 4 Bank Multibank Charger is right for you if…
- You need to keep four seasonal vehicles or motorcycles topped off in a damp garage — the IP65 weather resistance handles that perfectly.
- You own lithium LiFePO4 batteries and want a maintainer that’s compatible without any extra adapters.
- You want something lightweight and compact at just 3.21 ounces that you can mount on a wall near your storage area.
Battery Tender 5 Bank Multibank Charger is right for you if…
- You need to actually recharge batteries, not just maintain them — the 4 amps per bank is over three times stronger than the 4 Bank.
- You have a mix of 6V and 12V batteries in your collection, like classic cars and modern vehicles, and need one charger for both.
- You’re running a small fleet of five vehicles or marine batteries and want to charge them all at the same time.
❌ Who Should Skip All of These?
If you only need to charge one or two batteries at home, a single-bank Battery Tender would save you money and take up way less space. And if you’re trying to revive deeply discharged large truck or RV batteries quickly, you’ll want a higher-amp standalone charger rather than any multibank unit.
For the most common buyer — someone with a few motorcycles, a classic car, or a boat in storage — I’d grab the 4 Bank every time. It’s weather-resistant, cheaper, and the 1.25 amps per bank is plenty for keeping healthy batteries topped off over the winter.
Frequently Asked Questions
Which is better for maintaining batteries in winter storage — the 4 Bank or the 5 Bank?
For winter storage, I’d pick the 4 Bank without hesitation. Its 1.25 amps per bank is plenty to keep a healthy battery topped off, and the IP65 weather resistance means it can handle a cold, damp garage or even a shed. The 5 Bank is overkill for storage, plus it’s heavier and not weather sealed.
Is the 5 Bank worth paying more for over the 4 Bank?
Only if you actually need the extra power. The 5 Bank gives you 4 amps per bank versus the 4 Bank’s 1.25 amps, so it can recharge a battery in around 25 hours instead of 72 hours. If you’re just maintaining batteries that are already charged, the 4 Bank does the same job for a lot less money.
Can the 4 Bank charge lithium LiFePO4 batteries?
Yes, absolutely. The Battery Tender Plus 4 Bank is compatible with lithium LiFePO4 batteries right out of the box. The 5 Bank also supports 12V lithium LiFePO4, but it’s a bit overkill if you’re only running lithium batteries since they don’t need high amperage for maintenance.
Which charger works with 6V batteries?
Only the 5 Bank can handle 6V batteries. It has a selectable 12V or 6V mode, which is great if you’ve got a classic car or vintage motorcycle with a 6V system. The 4 Bank is strictly 12V only, so keep that in mind if you have mixed voltage vehicles.
How many batteries can each charger handle at once?
The 4 Bank handles up to four batteries simultaneously, while the 5 Bank handles up to five. But keep in mind the amperage difference: the 4 Bank splits 5 total amps across four banks, and the 5 Bank splits 20 total amps across five banks. That’s a huge difference in real charging speed per battery.
Which one is more durable for outdoor or garage use?
The 4 Bank is the clear winner here. It has an IP65 weather-resistant rating, which means it’s protected against dust and water spray. The 5 Bank has no weather resistance rating at all, so I’d only use it indoors or in a completely dry space.
My Final Verdict
I’m giving the win to the Battery Tender Plus 4 Bank. For the vast majority of people who just need to keep multiple batteries healthy through the off-season, its IP65 weather resistance, lithium compatibility, and compact size at 3.21 ounces make it the smarter choice. The 5 Bank is only better if you genuinely need 4 amps per bank to recharge batteries faster, or if you work with 6V systems.
If you’re still on the fence, ask yourself this: are you maintaining charged batteries or recharging dead ones? For maintenance, the 4 Bank is perfect. For recharging, you need the 5 Bank. Don’t overbuy if you don’t need the power.
Winner: Battery Tender Plus 4 Bank
- 4 Charging Stations: Charge up to four 12 volt batteries at 1.25 AMPs...
- Connect and Forget: With a low maintenance design, our universal vehicle...
- Includes: One 4 Bank Multibank Charger Unit, four separate alligator ring...
Best for anyone who wants a weather-resistant, lightweight maintainer for up to four 12V batteries, including lithium. The IP65 rating and 4.7-star average from over 1,800 reviews say it all.
Runner-Up: Battery Tender 5 Bank
- 5 Charging Stations: Charge up to five 12 volt or 6 volt batteries at...
- Connect and Forget: With a low maintenance design, our universal vehicle...
- Includes: One 5 Bank Multibank Charger Unit, five separate alligator clips...
Best for buyers with five batteries to charge and a need for 4 amps per bank, or anyone who needs 6V compatibility. It’s powerful but heavy at 4.8 kg and lacks weather protection.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.