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Ionic Lithium 12V 100Ah S12M | 1280 CA | LiFePO4 Marine Pontoon Starter Battery

Ionic Lithium 12V 100Ah S12M | 1280 CA | LiFePO4 Marine Pontoon Starter Battery

Fast Free Shipping on $150+ in The US
5-year warranty

Starts your outboard every time. Weighs 49 lbs less than the battery it replaces. Monitors itself from your phone.

  • 1,280 Cranking Amps — compatible with all major brands – starts standard 12V marine outboards with ease.
  • 800 Cold Cranking Amps (3 sec, tested at 0°F) — reliable cold-weather starts
  • 25.9 lbs — about 49 lbs lighter than a comparable lead-acid Group 31
  • Group 31 drop-in — fits your existing battery tray, no wiring changes
  • Bluetooth via free Ionic Red Battery app (iOS & Android) — check charge level from your phone
  • Built-in Emergency Start — long-press the button or tap the app; no jumper cables needed
  • Built-in self-heater — activates automatically below 32°F; Accepts a charge even in cold climates
  • 5-year full replacement warranty — backed by US-based support

Original price was: $899.00.Current price is: $699.00.

Availability: 632 in stock

Warranty: 5 Years

3/8"-16 Terminal Adapter

3/8"-16 Terminal Adapter:

  • For use with our red 12v S9 starter batteries and with deep cycle batteries with 3/8th terminals on them.
  • SAE 3/8"-16 thread female, used for any battery that has the terminal 3/8" threaded studs (lead-acid or lithium batteries) extension to standard top post.
  • Sturdy terminal post adapter for increased strength, conductive and reduced corrosion.
  • Adapters come as a set - one positive and one negative.
  • Weight - .2 oz

Ionic Lithium LiFePO4 12V 10A Charger

These chargers are constant current, constant voltage (CCCV) “Smart” chargers for 12V LiFePO or lead-acid batteries. “Smart” chargers stop charging once it reaches 14.6V.

For safety reasons, the charger times out and stops charging after 72 hours of continuous use. This is indicated by blinking red LEDs. To activate the charger again, simply disconnect and reconnect the power cable.

- +
Fast Free Shipping on $150+ in The US
5-year warranty

Starts your outboard every time. Weighs 49 lbs less than the battery it replaces. Monitors itself from your phone.

  • 1,280 Cranking Amps — compatible with all major brands – starts standard 12V marine outboards with ease.
  • 800 Cold Cranking Amps (3 sec, tested at 0°F) — reliable cold-weather starts
  • 25.9 lbs — about 49 lbs lighter than a comparable lead-acid Group 31
  • Group 31 drop-in — fits your existing battery tray, no wiring changes
  • Bluetooth via free Ionic Red Battery app (iOS & Android) — check charge level from your phone
  • Built-in Emergency Start — long-press the button or tap the app; no jumper cables needed
  • Built-in self-heater — activates automatically below 32°F; Accepts a charge even in cold climates
  • 5-year full replacement warranty — backed by US-based support
5 Warranty Icon
5 Year Warranty
BLUETOOTH CONNECTION
Bluetooth Enabled
iPhone/Android App
iPhone/Android App
Free Shipping
Free Shipping

50%

Lighter

0%

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Product Description

5-Year Warranty
Full replacement — not pro-rated, not depreciated

Built-in Bluetooth
Free — iOS & Android, monitor your battery in real time

Free Shipping
On all US orders $150+

US-Based Support
M–F 9AM–5PM EST

1,280 CA
Cranking amps (3-sec burst)

25.9 lbs
~49 lbs lighter than lead-acid

Ionic Batteries App
Monitor charge from your phone

Emergency Start
Built-in 25% reserve backup — no jumper cables needed

Most lead-acid boat batteries fail every 2–4 years. Most pontoon owners replace them twice before they sell the boat.

This is a 1,280 cranking amp LiFePO4 starter battery that weighs 25.9 lbs — about 49 lbs lighter than the lead-acid Group 31 it replaces. Drop it in your existing battery box. No wiring changes. Comnpatible with all major brands.

It also does three things your current battery can’t:

  • Monitors itself. The Ionic Red Battery app shows your battery’s charge level from your phone — check it from your truck before you back the boat down the ramp.
  • Heats itself in winter. The battery management system (BMS) activates an internal heater below 32°F automatically so that it can accept a charge even in cold climates. Leave it in the boat all winter. Turn the key in the spring.
  • Backs itself up. If your charging system fails on the water, long-press the Emergency Start button or tap it in the app to activate a built-in reserve that cranks the motor. No jumper cables. No tow bill. Peace of mind wherever you are. Just press the button on the battery to activate or use your phone to access the app.

Covered by a 5-year full replacement warranty. Backed by US-based support. Most owners will sell the boat before they need a new battery.

Ionic S12M LiFePO4 marine starter battery on pontoon boat

1,280 Cranking Amps

Starts standard 12V marine outboards including all major brands, even on cold mornings. CCA: 800A tested at 0°F.

25.9 lbs vs. ~75 lbs

Nearly 50 lbs lighter than a comparable lead-acid Group 31. Same Group 31 footprint — drops in without modification.

Bluetooth Monitoring

Ionic Red Battery app (iOS & Android, free, no subscription). Check your battery’s charge level from your phone using built-in bluetooth technology — from the dock, from the truck, before you ever touch the key.

Emergency Start Reserve

Long-press the red button or tap the app. A dedicated reserve activates to crank the motor when your charging system fails. Handles the failures that actually happen on the water.

Built-In Self-Heater

The BMS activates an internal heater below 32°F automatically so that the battery can accept a charge even when it’s below freezing. Leave it in the boat all winter with no issues.

5-Year Full Replacement

Full replacement warranty — not pro-rated, not depreciated. US-based support available M–F, 9AM–5PM EST.

What does this actually cost over 10 years?

Lead-Acid Group 31 (status quo) Ionic IC-12V100-S12M
$120–250 per battery $699 (one time)
Fails every 2–4 years 5-year full replacement warranty
3–4 replacements over 10 years You’re more likely to sell your boat before you replace this battery
$360–1,000 over 10 years Breaks even by year 5 plus extra features and better performance
Risk: $150–400 tow bill if it fails Built-in Emergency Start backup
No monitoring — guess at the dock Check charge from your phone

In the Box

Included IC-12V100-S12M battery, terminal hardware, IonicRedBattery app setup guide, warranty card
App Download Ionic Red Battery — free, iOS and Android, no subscription, no account required
Documentation Ionic Starter Bluetooth Manual, Starter Battery Manual, Spec Sheet (PDFs — Documentation tab)

Ionic Lithium Starter Battery 12V 100Ah

ELECTRICAL SPECIFICATIONS
Nominal Voltage 12 V
Nominal Capacity 100 Ah
Energy 1,280 Wh
Resistance ≤20 mΩ
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 4
MECHANICAL SPECIFICATIONS
Dimensions (L x W x H) 13 x 6.8 x 10″
330 x 175 x 256 mm
Weight 25.9 lbs (11.75kg)
Terminal Type 2x 3/8-16 NMC + 1 car post
Terminal Torque 80 – 100 in-lbs (9 – 11 N-m)
Case Material ABS
Enclosure Protection IP56
Cell Type – Chemistry Prismatic- LiFePO₄
TEMPERATURE SPECIFICATIONS
Operating Temperature -4°F~140°F (-20°C~60°C)
Charge Temperature 32°F~140°F (0°C~60°C)
Storage Temperature 32°F~140°F (0°C~60°C)
BMS High Temperature Cut-Off 185°F (85°C)
Reconnect Temperature 158°F (70°C)
DISCHARGE SPECIFICATIONS
Maximum Continuous Discharge Current 500 A
Cranking Amps 1,280 A (3sec)
Cold Cranking Amps 800 A (3 sec)
Low Discharge Cut-Off Voltage 8 V
Low BMS Cut-Off Voltage 11.2 V
CHARGE SPECIFICATIONS
Recommended Charge Current 50 A
Maximum Charge Current 200 A
Recommended Charge Voltage 14.6 V
Charge Voltage Cut-Off 15.2 V
Reconnect Charge Voltage 14.4 V
COMPLIANCE SPECIFICATIONS
Certifications CE (battery)
UN38.3 (battery)
UL1642 & IEC62133 (cells)
Patent No. US9412994, US9954207, US11,598,306 B2
FEATURES
BlueTooth APP
Built in Emergency Start function that can be activated either by long pressing the start button or with the “IonicRedBattery” App
Built-in heating – if charging below 32°, the heater will turn on and warm the battery to allow a charge to be accepted

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

Q: Will this fit in my existing Group 31 battery box?

A: Yes. The IC-12V100-S12M shares the same Group 27/31 footprint (13 × 6.8 × 10 inches). It drops into your existing battery tray without modification. Terminal placement matches standard lead-acid layouts. No rewiring required.

Q: What is the difference between Cranking Amps (CA) and Cold Cranking Amps (CCA)?

A: CA is measured at 32°F and represents standard cranking power — this battery delivers 1,280 CA. CCA is the harder test: output sustained for 30 seconds at 0°F without dropping below 7.2V. This battery delivers 800 CCA. Both ratings are per spec sheet, 3-sec burst.

Q: Can I use my existing lead-acid battery charger?

A: Most modern marine multi-stage chargers work fine. The battery accepts charge at 14.6V (recommended) with a 15.2V cut-off. Avoid older single-stage chargers that run above 15.2V. An Ionic-compatible smart charger is available at lithiumhub.com and is the recommended option.

Q: What exactly does the Emergency Start function do?

A: When your main starting circuit is compromised — low charge, wiring fault, or BMS safety cutoff — long-press the red physical button on the battery (or tap Emergency Start in the IonicRedBattery app) to activate a dedicated reserve. The battery management system bypasses normal cutoff thresholds to deliver a crank sequence. No jumper cables or external power source needed. It activates a reserve for real-world failures — not a full recovery from absolute zero discharge.

Q: Does this work in cold weather? What about Minnesota winters?

A: The battery operates at -4°F and delivers 800 CCA tested at 0°F. The motor starts. Below 32°F, the built-in self-heater activates automatically to warm the cells to the charge threshold before accepting current — no manual intervention required. For seasonal storage, leave it in the boat. It self-manages.

Q: Will this damage my boat’s alternator?

A: No. The battery management system (BMS) regulates charge acceptance and protects your alternator from overload. Compatible with standard marine alternators at 14.4–14.6V output. If your alternator output has never been tested, the IonicRedBattery app will show you the real charge voltage in real time.

Q: How does the Bluetooth monitoring work? Is there a subscription?

A: Download the IonicRedBattery app (free, iOS and Android — no subscription, no account required). Power on the battery, open the app, and it auto-detects via Bluetooth. Full setup takes under 2 minutes. The app shows charge level, voltage, and temperature. Setup guide is included in the box.

Q: Can I run my fishfinder, Livescope, and electronics off this battery?

A: Yes. The IC-12V100-S12M functions as a dual-purpose battery — both cranking and house/accessory. The 100Ah capacity and flat LiFePO4 discharge curve means accessories run at consistent voltage all day instead of gradually dimming as lead-acid depletes. For very high-draw setups, contact our support team to confirm your specific application.

Q: How does the 5-year warranty work?

A: The IC-12V100-S12M is covered by a 5-year full replacement warranty — not pro-rated, not depreciated. If the battery fails under normal use within 5 years, we replace it at no charge. Call 704-360-9311 (M–F, 9AM–5PM EST) or email support@lithiumhub.com to initiate a claim.

Q: What is the return policy?

A: [PLACEHOLDER: Insert current return policy — number of days, condition requirements, who pays return shipping. Verify before publishing.]

Q: What does this cost over 10 years compared to lead-acid?

A: A replacement Group 31 lead-acid battery runs $120–250 and typically lasts 2–4 years. Over 10 years that’s 3–4 purchases totaling $360–1,000, plus the risk of a $150–400 tow bill if it fails on the water. The IC-12V100-S12M at $699 breaks even around year 5 and delivers no replacement costs beyond that. Most pontoon owners sell the boat before they need a new battery.

Ionic Starter Bluetooth Manual
Starter Battery Manual
Spec Sheet

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