LiFePo4 12V 9Ah Battery | Starter Battery


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Comes with an outstanding 5-year warranty
  • Ideal starter battery for zero-turn lawn mowers above 21hp & Side-by-Sides/UTVs
  • 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


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Product Description

12V 9Ah Starter Battery: Lasting Power

lifepo4 12v 9ah battery | starter batteryOur 12V 9Ah 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 9Ah 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 9Ah lithium 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 9Ah 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 9Ah 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!

Nominal Voltage 12.8 V
Nominal Capacity 9 Ah (27Ah)
Energy 115 Wh
Resistance ≤50 mΩ @50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 4
Maximum Continuous Discharge   Current 50 A
Cranking Amps 720A (3s)
Cold Cranking Amps 400A (3s)
Recommended Low Voltage   Cut-Off 11 V
BMS Discharge Voltage Cut-Off 8 V
Reconnect Voltage 9.2 V
Short Circuit Protection 200-600 µs
Discharge Temperature -4 to 140°F (-20 to 60°)
Charge Temperature -4 to 113°F (-20 to 45°C)
Storage Temperature 23 to 95°F (-5 to 35°C)
BMS High Temperature Cut-Off 149°F (65°C)
Reconnect Temperature 122°F (50°C)
Dimensions (Lx W x H) 7.7 x 5.1 x 6.1″
     196 x 130 x 155 mm
Weight 4.4 lbs (2kg)
Terminal Type M6
Terminal Torque 80 – 100 in-lbs (9 – 11 N-m)
Case Material ABS
Enclosure Protection IP56
Cell Type – Chemistry Primsmatic- LiFePO₄
Recommended Charge Current 25 A
Maxiumum Charge Current 50 A
Recommended Charge Voltage 14.2 V – 14.6 V
BMS Charge Voltage Cut-Off 15.2 V
Reconnect Voltage 14.4 V
Certifications CE (battery)
     UN38.3 (battery)
     UL1642 & IEC62133 (cells)
BCI Group Size U1
Water Rating Water Resistant

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

Customer Reviews

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Customer Reviews
5.0 Based on 4 Reviews
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Filter Reviews:
Derek G.
I recommend this product


Replaced my lawnmower battery with IONIC Starter and it has been working great. I would recommend it.

I recommend this product

I bought my last mower battery!

I previously bought a 12v 4ah Red a few months ago for our JD X320. With leaf sweeping season upon us the 20 year old JD G100 was getting really sluggish in the starting department so I sprung for the 12v 9ah for that mower. Ive had it in a week now and I am very satisfied with the battery. After the holidays I have the RV upgrade on the drawing board, I plan on installing (3) of the Blue 125ah heated batteries.

Tom S.
I recommend this product

Powering a Scotts 20hp tractor (by John Deere)

I bought this 400A battery to power my old lawn tractor. It starts immediately! I had many problems with a lead acid battery. The nicest thing about it is that I don't have to keep it charging all the time.

United States United States
I recommend this product

Lawnmower Battery 12V 9AH

I'm giving this battery a 5 Star rating because it is working like a champ in my Zero Turn 27 HP Husqvarna Mower. The engine starts in an instant with this battery, just instantly! Lead acid batteries lasted about a year and would be really weak starting. This Ionic lawn mower battery is really ahead of it's time. It has Bluetooth technology and the App makes it possible to turn the battery OFF, this give's a element of security also as the engine will not have power to start! Turn it on and you are running in an instant. The battery is so much lighter also and very clean. No more corrosion in the battery compartment. And the price for a top technology is affordable in this battery. If you demand the best, then you will be well served with this IONIC Lawn mower battery! Give them a try you will be amazed and very well satisfied. Go IONIC, best choice of Lithium batteries!! I highly recommend IONIC lawn mower batteries, the best there is.

LiFePo4 12V 9Ah Battery | Starter Battery 5.00 stars 4 reviews.

experience the most powerful lithium starting batteries on the market

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


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

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50 percent lighter


zero maintenance


2x the power


5x faster charging

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