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12 Volt 125Ah Lithium Deep Cycle Battery

  • Free shipping in the U.S.
  • 11-year warranty
  • Ships internationally to most countries

$789.00

Availability: 375 in stock

Warranty: 11 Years

  • Comparable to 900 cranking amps
  • This battery can be used as a starter battery for 150 to 250 hp Yamaha or Mercury motors
  • Battery Management Systems (BMS) with power terminal cut-off and recovery
  • Built in cold weather protection – Does not take a charge if temperatures are below -4C or 24F in our case. Some variations with part tolerances.
  • Ionic batteries have proprietary software embedded in the BMS to make our batteries 100% compatible with Yamaha or Mercury motors
  • 70% lighter than lead acid batteries
  • Two to four times the service life (3000-5000 cycles)
  • Great for marine, RV, floor sweepers, lift gates, UPS systems, solar energy storage
  • Cell balancing and low voltage/over voltage protection, short-circuit protection
  • Bluetooth technology to monitor battery status
  • Maximize your energy potential with 99% Depth of Discharge (DOD)
  • Drop in replacements (plug and play)
  • Run as many needed in parallel
  • Can go up to 4 in series with this battery
  • Comes with an 11 Year Battery Warranty to give you peace of mind with your purchase.
  • Compatible with the following chargers: Ionic, Noco Gen Pro, Dual Pro PS/ Auto, Minnkota Precision, Pro Mariner/Pro Tournament Elite, Stealth, Troll Bridge DC, Power Pole.

Magnuson-Moss Warranty Act: A vehicle manufacturer cannot legally void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)). Ionic Batteries have proprietary software embedded in the Battery Management Systems that make them 100% compatible with Yamaha or Mercury 250 hp motors. Learn More

Product Description

Ionic Lithium Deep Cycle 12 Volt 125Ah Battery

World Class Safety Features

Ionic Deep Cycle Lithium Battery 12V125-EP has 12 volts and a 125Ah capacity and is perfect for powering your deep cycle systems. Can be used as a starting – dual Lithium battery comparable to 900A cranking amps for 250hp engines. Ionic Deep Cycle has an internal microprocessor controlled battery management system (BMS) that monitors the key operational parameters during charging and discharging, such as voltages, currents and internal temperatures.

Ionic 12V 125Ah batteries used as starters batteries have been engineered to work with overcharging issues that different outboard marine motors have.  “Ionic 12V 125Ah batteries used as starters batteries will work with outboard motors including Mercury and Yamaha.”

Built for Long Lasting Reliable Power

The Ionic Deep Cycle Battery has a cycle life of 3,000 cycles or about 10 calendar years. Our lithium-ion batteries have a usable capacity of 99% compared to 50-60% for traditional lead-acid batteries]. LithiumHub Deep Cycle batteries function in the widest range of temperatures with a discharge temperature range (Functional) of –20°C to 60°C (–4°F to 140°F) and a charge temperature range of 0°C to 45°C (32°F to 113°F). Automatically detects if batteries are too cold to take a charge.

The Ionic Lithium Deep Cycle line has the best weight to power ratio on the market

At 12.55” (L) x 6.5″ (W) x 9.22″ (H) and weighing only 34.2 lbs., the Ionic Lithium Deep Cycle 12V125-EP has the best size to power ratio of any deep cycle battery on the market. Connectors: 3/8 UNC Threads allow the battery to be installed in any direction unlike lead-acid batteries which are fixed. Ionic Lithium Deep Cycle Batteries self-discharge rate per month is between 1-3% compared to lead-acid batteries which are about 30%. Max charge voltage is 14.6V and the discharge cut-off voltage is 10.5V. Max charge current is 80A and max discharge current is 100A / 500A(3s). Can be charged with solar chargers. Can be charged with most traditional lead-acid chargers that do not have “Desulfate” mode, provided the current levels do not exceed lithium battery charge specification. Using a traditional lead-acid charger that reaches 14.4-14.6 volts will allow the battery to be fully charged. Chargers that do not exceed 13.6 volts will only charge the battery to 50% capacity or less.

Product Dimensions

Group 31 measurements

Widest spots. The battery does taper on the very base bottom.
Length : 12.52 in. => 12 1/2 in. => 318mm
Width: 6.496 in. => 6 1/2 in. => 165mm
Height (studs base): 8.465 in. => 8 15/32 in. => 215mm
Height (studs top): 9.2 in. => 9 13/64 in. => 233mm

Fits Group 31 battery trays

Has Bluetooth connection

Has Bluetooth connection
Can be charged in series

Can be charged in series
Can be charged in parallel

Can be charged in parallel
Free Shipping

Free Shipping
Lithiumhub 30 Day Return Policy

30 Day Return Policy
11 Year Battery Warranty

11 Year Battery Warranty
Model IC-12V125-EP4S
Voltage 12V
Capacity 125Ah, 1600Wh
Chemistry LiFePo
Weight 34.2 lbs (15.5 kg)
Dimensions 12.55″ (L) x 6.5″ (W) x 9.2″ (H)
319x165x234mm
Life Cycles 3,000 @ 80% DOD
BMS Yes (Internal)
Max Charge Voltage 14.6±0.1V
Discharge Cut-Off Voltage ~8.0V
Max Charge Current 50A
Max Discharge Current 100A
Crank Amps 900A
Pulse Discharge Current 500A (3S)
Operating Temperature -20~60℃
-4℉~140℉
BCI Group Size 31
Terminal 3/8-16 UNC Thread

Please read our frequently asked questions page for answers commons questions regarding lithium ion batteries.

Ionic Deep Cycle Manual

Spec Sheet

Bluetooth Guide

Performance Curve

Safety Data Sheet

Customer Reviews

Don't just take our word for it! See real feedback from our customers

Customer Reviews
5.0 Based on 233 Reviews
5 ★
98% 
228
4 ★
2% 
4
3 ★
0% 
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2 ★
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Customer Photos
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Filter Reviews:
RC
06/21/2022
Ryan C.
US US
I recommend this product

12 volt 125aH starting battery.

Have used this product on two fishing trips so far. Ran live wells, fish finders, and power pole all day with 93% remaining at end of trip. This along with lithium trolling batteries provides for shallower draft and time to plane is best described as “right now”

R
06/21/2022
Rich
US US
I recommend this product

Power

Very easy to order, quick delivery and easy install. Use as a house battery for cranking, electronics with 4 graphs, mega 360 and live scope, radio, pumps, lights, etc. and amazing how well it holds up. Yamaha motor charges it well during runs. Bluetooth app leaves no doubt where the battery is on the water for extra piece of mind.

RT
06/21/2022
Robert T.
US US
I recommend this product

very pleased

the batteries exceeded my expectations. great investment.

RL
06/20/2022
Roy L.
US US
I recommend this product

Great upgrade

So far so good. Does what it says . Plenty power

BO
06/20/2022
Brian O.
US US
I recommend this product

Cranking Battery

Super happy with the purchase. Was shipped out the same day that I ordered it, and can run it for 8 hours a day and most of the time doesn't even drop below 80%. App for the battery is great to have.


12 Volt 125Ah Lithium Deep Cycle Battery has a rating of 4.97 stars based on 239 reviews.

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11 year
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bluetooth
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Monitor your charge at any time from our user-friendly Ionic mobile app.

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get the battery of tomorrow, today

50%

50 percent lighter

0%

zero maintenance

200%

2x the power

500%

5x faster charging

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