Sale!
5 Warranty Icon
5 Year Warranty
BLUETOOTH CONNECTION
Bluetooth Enabled
iPhone/Android App
iPhone/Android App
Free Shipping
Free Shipping

50%

Lighter

0%

MAINTENANCE

200%

POWER

500%

CHARGING

Ionic Lithium 12V S8 Group U1 | 720 CA | LiFePO4 Starter Battery + Bluetooth

Ionic Lithium 12V S8 Group U1 | 720 CA | LiFePO4 Starter Battery + Bluetooth

Fast Free Shipping on $150+ in The US
5-year warranty
  • Ideal starter battery for zero-turn lawn mowers above 21hp & Side-by-Sides/UTVs
  • Cranking Amps (CA) – 720A
  • Cold Cranking Amps (CCA) – 400A
  • Battery Management Systems (BMS) with power terminal cut-off and recovery
  • 70% lighter than lead acid batteries and substantially more compact
  • Two to four times the service life (approx. 3,000 cycles at 80% DOD)
  • Cell balancing, low voltage/over voltage protection, & short-circuit protection
  • Know the status of your battery at all times with Bluetooth technology
  • Simply plug & play with drop-in replacement
  • Once battery is at 25% capacity, it will automatically turn off to store reserve energy
  • Emergency Start function can be used with the click of a button and will use the leftover battery reserve if you find yourself in a pinch
  • Have total peace of mind with 5-year warranty
  • Dimensions (Lx W x H): 7.7 x 5.1 x 6.1″ (196 x 130 x 155 mm)
  • Weight: 4.4lbs
  • Connect up to four in series & unlimited in parallel. Learn more

Original price was: $199.00.Current price is: $189.00.

Frequently Bought Together With:

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.

M6 Terminal Adapter

M6 Terminal Adapter:
  • For use with our red 12v starter batteries:
  • METRIC M6 thread male, used for any battery that has the terminal M6 threaded holes (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 - .15 oz

Ionic Lithium LiFePO4 12V 2A Trickle Charger

  • This smart trickle charger provides a lower charge to prolong the battery's charge during extended periods of inactivity.
  • A constant current and voltage is provided until the battery reaches full charge, then it will hit floats mode to maintain full charge. This helps maximize the life of your lithium battery.
  • 12V LiFePO 2A charger works with all of our Deep Cycle Lithium Batteries, Starter Batteries as well as lead-acid.
  • You can wire this charger in parallel to provide additional charging current to large battery systems.
  • 30-day return policy.

Out of stock

Warranty: 5 Years

- +
Fast Free Shipping on $150+ in The US
5-year warranty
  • Ideal starter battery for zero-turn lawn mowers above 21hp & Side-by-Sides/UTVs
  • Cranking Amps (CA) – 720A
  • Cold Cranking Amps (CCA) – 400A
  • Battery Management Systems (BMS) with power terminal cut-off and recovery
  • 70% lighter than lead acid batteries and substantially more compact
  • Two to four times the service life (approx. 3,000 cycles at 80% DOD)
  • Cell balancing, low voltage/over voltage protection, & short-circuit protection
  • Know the status of your battery at all times with Bluetooth technology
  • Simply plug & play with drop-in replacement
  • Once battery is at 25% capacity, it will automatically turn off to store reserve energy
  • Emergency Start function can be used with the click of a button and will use the leftover battery reserve if you find yourself in a pinch
  • Have total peace of mind with 5-year warranty
  • Dimensions (Lx W x H): 7.7 x 5.1 x 6.1″ (196 x 130 x 155 mm)
  • Weight: 4.4lbs
  • Connect up to four in series & unlimited in parallel. Learn more
5 Warranty Icon
5 Year Warranty
BLUETOOTH CONNECTION
Bluetooth Enabled
iPhone/Android App
iPhone/Android App
Free Shipping
Free Shipping

50%

Lighter

0%

MAINTENANCE

200%

POWER

500%

CHARGING

Product Description

12V S8 Group U1 720 Cranking Amp Starter Battery: Lasting Power

lifepo4 12v 9ah battery | starter batteryOur 12V Group U1 720 Cranking Amp battery is perfect for starting zero-turn mowers (above 21hp) and Side-by-Sides/UTVs. They’re lightweight, energy efficient, and offer Bluetooth monitoring at all times.

Without the use of a trickle charger, most lead acid starter batteries go bad after the mowing season is over. Why? Because they simply drain too low. What’s the use of a battery if it has to be replaced year after year? With a dependable LiFePO4 starter battery you’ll no longer face these issues. One of the most celebrated benefits of our starter batteries is that they’ll turn off with 25% capacity remaining, instead of no longer being usable.

So whether you’re using our 12V S8 Group U1 720 Cranking Amp Starter battery in a mower or a UTV, you don’t have to worry if you accidentally run it too low. With our built-in Emergency Start function, you can simply press a button and get things fired up again in an instant. All thanks to the emergency start and your battery reserve. Easy peasy.

Impressive Safety Features

First off all, Ionic batteries are rigorously tested in-house, and only contain Grade A battery cells.

Second, each and every battery from LithiumHub comes with a built-in Battery Management System (BMS). This advanced system monitors the battery’s voltage, currents, and temperature at all times. If the temperature is too hot or cold, these “smart batteries” won’t accept the charge. This means your battery will last longer and you won’t face damage from voltage issues or the circuit shorting out.

And with the use of the Ionic App you’ll have immediate access to your battery’s juicy details at all times. Who wants their lawn mower to die and fail to start, mid-job? Or their UTV to stop blazing trails and fail to start, miles and miles away from home? As much of an inconvenience either scenario may be, it can also be a safety issue. So before you set out, check the status of your 12V 9Ah battery via the Ionic App. There you can check the status of your charge, voltage, current, discharge, temperature, and more. You’ll be in the know at all times! So whether you’re a homeowner or a business owner, there are plenty of benefits of powering up your lawn mower or UTV/Side-by-Side with a trusted LiFePO4 12V 9Ah battery from LithiumHub.

They Simply Last Longer..

lifepo4 12v 9ah battery | starter battery
When it comes to longer battery life, there’s no comparison between lithium and lead acid batteries. Our 12V 9Ah battery is rated to last 3,000 cycles at 80% DOD. Depending upon how often you mow your property or take your Side-by-Side out, this could easily translate to 10+ years of use. Imagine all the hunting, zipping around, and yard work you can smash out!

With zero maintenance, there’s no reason your 12V S8 Group U1 720 Cranking Amp Starter battery shouldn’t be functioning to the max. No worries with checking water levels or running to the store for distilled water. Again, lithium LiFePO4 batteries require no maintenance whatsoever.

And coming in at an impressively light 4.4 pounds, your back may last longer too. So drop your new 12V 9Ah battery in as soon as it arrives and enjoy a smoother, easier experience.

Best Uses For The Ionic Lithium 12V 9Ah Battery

The best uses for an Ionic lithium 12V S8 Group U1 720 Cranking Amp Starter battery include starting zero-turn riding lawn mowers above 21hp and your favorite UTV/Side-by-Side.

Have Questions? Give Us A Ring

Wondering if the Ionic 12V S8 Group U1 720 Cranking Amp Starter battery is right for you? Or do you have specific questions you need help with? No problem. Get expert advice today by reaching out over the phone or through email. Our expert staff will be glad to assist you!

Contact Us Now!

Battery Model IC-12V9-S8
Starter Battery Size 12V9Ah
Voltage 12V
Capacity 9Ah/115Wh
Chemistry LiFePo4
Weight 4.4lbs (2kg)
Dimensions 7.7″ (L) x 5.1″ (W) x 6.1 (H)
196x130x155mm
Life Cycles 3,000 @ 80% DOD
Max Charge Voltage 14.6±0.1V
Recommended Float Charge Voltage 13.9±0.1V
Discharge Cut Off Voltage ~8.0V
Output Voltage Range 8.0~14.6V
Cold Cranking Amps 400
Peak Cranking Amps (3 sec) 720
Operating Temparature -20~60C
-4F~140F
BCI Group Size U1
Terminal M6

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

IonicRedBatteries App Manual

Starter Battery 9Ah Spec Sheet

Starter Battery Manual

ModelIC-12V9-S8
CaseIC-12V9-S8
Voltage12V
Capacity9Ah
BCI Group SizeU1
Water RatingIP56
Weight4.4 lbs (2 kg)
Dimensions7.7" (L) × 5.1" (W) × 6.1" (H)
196x130x155 mm

Frequently Asked Questions

What's this battery best used for?

It’s a Group U1 lithium starter battery built for zero-turn riding mowers (above 21hp) and Side-by-Sides/UTVs, delivering 720 peak cranking amps (400 CCA). At just 4.4 lbs it’s about 70% lighter than a lead-acid U1, and the Bluetooth app lets you check charge, voltage, and temperature before you head out so a mower or UTV doesn’t die mid-job or miles from home.

How is this different from the S6 9Ah starter battery?

They’re the same battery electrically — both are 9Ah with 400 CCA / 720 peak cranking amps. The difference is the case: this S8 is a Group U1 size (7.7 × 5.1 × 6.1″) designed for mower/UTV trays, while the S6 uses a powersports case with spacer options for motorcycles, ATVs, jet skis, and Sea-Doos. Pick the one whose case matches your equipment.

Will it fit my existing battery tray?

It’s a standard Group U1 footprint (7.7 × 5.1 × 6.1″, 4.4 lbs), so it drops into most U1 trays. A few owners with non-standard powersports trays (e.g., some UTVs) have found the U1 case slightly larger than their OE battery and needed minor tray adjustment, so measure your tray first. It uses M6 threaded terminals; an M6-to-top-post adapter is available if your cables need standard posts.

How does the Emergency Start feature work?

The battery automatically shuts off at 25% capacity to hold a starting reserve. If you run it too low, press the button on the battery (or use the Ionic app) to tap that reserve and crank the engine — handy if you leave the key on or the mower sits over winter. The reserve stays available until the battery drops to 13.6V, and it reactivates by button or charging if unused for a few months.

What charger should I use?

Use a LiFePO4-compatible 12V charger that tops out at 14.6V — such as the Ionic 12V 10A charger, or the Ionic 12V 2A trickle charger for off-season maintenance. Note that some older lead-acid/AGM chargers (e.g., certain Optima chargers) won’t charge lithium; a lithium-capable charger like a NOCO is a good choice. Once installed, your mower or UTV charging system keeps it topped off while running.

Customer Reviews

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

EXPERIENCE THE MOST POWERFUL LITHIUM STARTING BATTERIES ON THE MARKET

red iconic

5 year
warranty

Buy with confidence with our competitive no-nonsense 5 year warranty.

grade a
cells only

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

bluetooth
monitoring

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

flash icon

get the battery of tomorrow, today

50%

50 percent lighter

0%

zero maintenance

200%

2x the power

500%

5x faster charging

related items

You may also like…

Shopping Cart