Upgraded 3 Bank Marine Battery Charger 10X3, 30A (10A/Bank) - 12V Waterproof Onboard Battery Charger, Battery Maintainer & Desulfator for SLA/AGM, Lithium (LiFePO4), Calcium & Deep-Cycle Battery
Condition: New
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
In Stock.
Arrives
Sunday, Aug 23
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Size: 3 Bank(30A)
Features
- 10X3, 3-Bank, 10A Per Bank: Marine battery charger for all types of lead-acid & lithium-ion 12V batteries, including marine, boat, starter & deep-cycle batteries. IP68 waterproof fully-sealed charging. Boat battery chargers can be charged 24/7 onboard.
- 3 Charging Modes: 12V SLA/AGM, 12V LITHIUM, 12V CALCIUM. 3 batteries can charge at the same time. Each battery can independently select the suitable mode via press "MODE".
- Force Mode: Onboard marine battery charger charge dead batteries. When battery is lower than 1V, you can manually begin charging: Only press and hold the MODE button for 5s.
- Auto Repair Mode & Advanced Diagnostics: You don't need to operate.12V Repairlight is on, automatically start repair. Advanced Diagnostics: Over Voltage, Bad Battery, Over Temperature, Reverse Connection. Help you find problems quickly.
- Enjoy Precision Charging: An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
- 3-YEAR WARRANTY FOR CHARGER: 5-Grid Power Display - 20%, 40%, 60%, 80%, 100%. Whats in the box : 1* On board battery chargers for boats; 3* Battery clips; 3* Battery connectors; 3* Spare fuses; 4* Screws; 1* Bag, 1* Manual.
Brand: FirstPower Pro
Color: gray
Product Dimensions: 1.77"D x 10.9"W x 10.23"H
Item Weight: 10.43 Pounds
Output Voltage: 12 Volts
Output Voltage: 12 Volts
Input Voltage: 120 Volts
Current Rating: 10 Amps
Amperage: 10 Amps
Compatible Devices: 12V batteries (lead-acid, lithium-ion, marine, boat, starter, deep-cycle)
Number of Ports: 3
Item Dimensions D x W x H: 1.77"D x 10.9"W x 10.23"H
Item Weight: 10.43 Pounds
Color: gray
Brand: FirstPower Pro
Mfr Part Number: 10X3 30A
Manufacturer: FirstPower Pro
Model Number: ICM10A
Warranty Description: 3 year warranty
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 23
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 2 Bank(10A)
Super Easy To Use and works great. Charging Multiple Batteries at one time
Reviewed in the United States on April 30, 2026 by Al
Size: 2 Bank(10A)
Works great, charged my dead batteries in just a little while. Sump pump had ran them down after a hard rain. Mounted and wired charger up and Next day both were fully charged and all green LEDs!!
Reviewed in the United States on June 3, 2026 by Amazon Customer
Size: 2 Bank(10A)
I absolutely love this charger. The ability to charge multiple battery types on separate channels is very convenient. I also appreciate that the charger remembers that selection and defaults to the selection when plugged in the next time. The charger is likely going to be larger and heavier than you expect after viewing pictures so make sure to note the measurements before ordering. The inclusion of alligator clamps for using this as a portable charger is a nice inclusion and makes this a better value if the end user wants to utilize the product without permanently mounting it.
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Reviewed in the United States on June 4, 2026 by Smitty
Size: 1 Bank(10A)
This is a very nice battery charger/ maintainer. Definitely built heavy duty to last. I think it is the perfect size for our rv. Charges our LifePo4 batteries quickly and safely and keeps them topped off. And you know, the price is not more expensive than any other quality battery charger. And so simple to set up and use.
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Reviewed in the United States on February 13, 2026 by Leland Hargrove
Size: 3 Bank(30A)
It works great and easy to use. It doesn't show battery life when not plugged in like they said. That is the only reason I bought this giant one. Otherwise seems to do the job.
Reviewed in the United States on May 17, 2026 by tony
Size: 3 Bank(30A)
This charges my trolling motor batteries in just a few hours. I run three lithium batteries and after a full day offshore they are charged and ready to go again in about 3 to 4 hours. It was easy to mount and hook up. and its not so expensive as other brands. Everything worked right away with no issues. It fits well in my setup and does not take up much space. Overall it has worked perfect for what I needed.
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Reviewed in the United States on January 18, 2026 Reviewed in the United States on January 18, 2026 by 904Local
Size: 3 Bank(30A)
I have multiple CTEK units along with the usual handful of Battery Tenders. The 3-bank unit seems constructed well, easy to grasp panel with modes/LED charging level. I have it connected to dual batteries in my boat, that is garage kept so no idea on how it fares outdoors, waterproofness, etc.. I've had it connected for approximately 3 months with no problem. If I had, or if they made, an SAE to CTEK-type Comfort Connector - I'd also connect my BMW GS-A battery to the 3rd bank!
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Reviewed in the United States on February 8, 2026 by Jeff
Size: 2 Bank(10A)
So far so good this thing is quick and effective. I had a few batteries that wouldn't charge fully or were struggling and I hooked this charger up and it didn't skip a beat charged them in a few hours no problem. Would definitely buy again.
Reviewed in the United States on May 23, 2026 by Terry Bright