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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: 4675 in stock

Warranty: 11 Years

Frequently Bought Together With:

12V LiFePO 20A Charger

These chargers are constant current, constant voltage (CCCV) "Smart" chargers for 12V LiFePO or lead acid batteries. "Smart" chargers stop charging once 14.6V is reached.

Ionic 4 Bank Charger 12V 10A

Keep Your Boat Batteries Charged Conveniently

  • Charges 12V Lithium (LiFePo4) batteries up to 4 banks at 10A the same time.
  • LED: Green indicates Charging Completed.  Red indicates Charging.
  • LED: Green indicates Fully Charged.  Red indicates Charging.  Amber indicates Standby.
  • Lightweight and low profile design
  • Can also be used for 2- 3 bank charging system.
  • Can be used to charge lead-acid or AGM batteries.
  • Ionic Lithium APP shows charge level and time to charge when using Ionic Lithium Batteries.
  • 60in (5ft) cable length on each bank
  • 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

$789.00

Availability: 4675 in stock

Warranty: 11 Years

Frequently Bought Together With:

12V LiFePO 20A Charger

These chargers are constant current, constant voltage (CCCV) "Smart" chargers for 12V LiFePO or lead acid batteries. "Smart" chargers stop charging once 14.6V is reached.

Ionic 4 Bank Charger 12V 10A

Keep Your Boat Batteries Charged Conveniently

  • Charges 12V Lithium (LiFePo4) batteries up to 4 banks at 10A the same time.
  • LED: Green indicates Charging Completed.  Red indicates Charging.
  • LED: Green indicates Fully Charged.  Red indicates Charging.  Amber indicates Standby.
  • Lightweight and low profile design
  • Can also be used for 2- 3 bank charging system.
  • Can be used to charge lead-acid or AGM batteries.
  • Ionic Lithium APP shows charge level and time to charge when using Ionic Lithium Batteries.
  • 60in (5ft) cable length on each bank

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
Water Rating Water Resistant

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 268 Reviews
5 ★
98% 
263
4 ★
1% 
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3 ★
0% 
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Customer Photos
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Filter Reviews:
JV
09/20/2022
Jim V.
US US
I recommend this product

12 Volt 125Ah lithium battery

Great battery. Got it for my Terrova trolling motor. Fished for about 6 hours in river current using spot lock most of the time and still had 70% power left. The blue tooth & phone app is great.

TH
09/20/2022
Tom H.
US US
I recommend this product

Awesome

First time buyer. I was concerned if they were worth the money . They’re worth every penny .

RJ
09/18/2022
Richard J.
US US
I recommend this product

Ionic Lithium

Purchased this 12V 125 Ah battery to replace my Series 31 AGM that could not keep up with power demands. I would have to drive around just to recharge it. Waste of fishing time. This battery is awesome. Now running more accessories for more hours using 1/4 of the battery's capacity. Soon as my trolling motor batteries display weakness, I'll be ordering three more of these. Great sales experience and very fast shipping.

MJ
09/17/2022
Matthew J.
US US
I recommend this product

MJ upstate NY

Excellent performance so far all day power on multiple electronic devices plenty of reserve power at end of day. Quick recharge as well. Very happy.

SB
09/14/2022
Steve B.
US US
I recommend this product

Just switched from lead cell

1 day on the water and only used 35% on starter battery with 4 graphs running, bilge pump all day (3 inches of rain), and live well running! Awesome after 1st use.


12 Volt 125Ah Lithium Deep Cycle Battery 4.97 stars 268 reviews.

experience the advantage of ionic brand lithium batteries

3 blue LithiumHub Ionic batteries.

11 year
warranty

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grade a
cells only

Ionic uses the best cells so your battery lasts longer and performs better.

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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