12V 100Ah Lithium Cranking Dual Purpose Battery
12V 100Ah Lithium Cranking Dual Purpose Battery

12V 100Ah Lithium Cranking Dual Purpose Battery

Regular price$699.00

  • Free Shipping to Lower 48 U.S. States
  • In stock, ready to ship
  • Inventory on the way
  • 8-Year No Gimmicks Warranty
1,000 Marine Cranking Amps
Can be used as both a deep cycle and a cranking battery

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Introducing the Astro Lithium Dual Purpose Battery - your comprehensive power solution designed for the outdoor enthusiast. Its versatility allows it to be used for both cranking and deep cycle applications, merging the best of both realms into a single, powerful battery.

Equipped with an impressive 1,000 Cranking Amps, this battery is perfect for a diverse range of starting applications. Adventure into the great outdoors with absolute confidence in your power source.

This Dual Purpose battery is not just for marine motors; it's also an excellent choice for golf carts equipped with high-amp aftermarket controllers or lift kits.

The Astro Lithium Battery is a leading choice for replacing Group 27 or 31 batteries. It provides significant weight savings alongside a substantial performance boost. Depending on your application, our 12v 100Ah battery can power your equipment for twice as long as a traditional Group 27 lead-acid battery, and it accomplishes this while being about 40 pounds lighter!

Our innovative technology enables a superior cell density, making this 100Ah battery compact and lighter than other 100Ah lithium batteries on the market. In fact, our battery possesses the same dimensions as a Group 24 battery, whereas most competitors need a Group 27 sized battery to match our capacity. Don't just take our word for it – experience the Astro Lithium Battery difference for yourself!

Engine Compatibility

Due to the newness of lithium battery technology, some marine motor manufacturers have adopted different guidelines for lithium cranking batteries with their motors. See below for motors that the Astro Lithium 12V 100Ah Dual Purpose Cranking Battery is compatible with. 


As of 9/26/2022, Mercury released Service Bulletin 2022-19 listing compatibility with the following motor models:

  • 2.1L 75-115hp Fourstroke, ProXS and SeaPro Models
  • 3.0L 150hp Fourstroke, ProXS and SeaPro
  • 4.6L V8 and 3.4L V6 175-300hp Fourstroke, ProXS, SeaPro and Verado Models
  • 2.6L L6 200-400 Pro and Verado Models
  • 7.6L V12 500-600hp SeaPro and Verado Models


Suzuki has not officially listed any motors as compatible or incompatible with lithium cranking batteries. 


As of 2/16/2024, Yamaha's latest statement on lithium cranking batteries is as follows:

Yamaha is currently testing the wide range of configurations and materials used to construct Lithium lon batteries and the internal circuits used to monitor, accept, and distribute amperage/voltage. Until said testing is complete, Yamaha cannot recommend the use of Lithium Ion batteries with Yamaha Marine products.



  • Built-In Bluetooth monitoring with the Astro Lithium mobile app.
  • IP65 rating enclosure means high tolerance to harsh environments with exposure to dust and water. 
  • Zero maintenance required.
  • Can be mounted in any orientation. Upside down, sideways, angled, or right side up. Send in your creative mounts and twice a year we will pick a winner for some Astro Lithium gear!
  • Automatic internal cell balancing
  • Up to 50% lighter than traditional lead acid batteries.
  • 8-Year "No Gimmicks" Warranty

Battery Management System

Every Astro Lithium battery has on board Battery Management System, also known as a BMS. 

The main functions of the Astro Lithium BMS are as follows:

  1. Cell balancing: Our BMS ensures that all the cells within a battery pack are balanced and charged equally. This helps to prevent overcharging or undercharging of individual cells, which can cause performance issues or even damage to the battery.

  2. Charge control: Our BMS regulates the charging process to ensure that the battery is charged within safe limits. This helps to prevent overcharging, which can cause overheating and damage to the battery.

  3. Discharge control: The BMS regulates the discharge process to prevent the battery from being discharged beyond safe limits. This helps to prevent damage to the battery and extends its lifespan.

  4. Temperature control: The BMS monitors the temperature of the battery and regulates the charging and discharging processes to ensure that the battery operates within safe temperature limits. This helps to prevent overheating, which can cause performance issues and damage to the battery.

  5. State of charge (SOC) and state of health (SOH) monitoring: Our BMS monitors the SOC and SOH of the battery to provide information on the battery's capacity and health. This helps to prevent overcharging, undercharging, and other issues that can damage the battery and shorten its lifespan.

General Specs


25 lbs

Dimensions (LxWxH)

10.15" x 6.50" x 8.25"

(Equal to Group 24 Battery in dimensions)

Terminal Type


Cell Type



Electrical Specs

Nominal Voltage 12.8v
Nominal Capacity 100Ah
Energy 1280Wh
Cycle Life 3000 cycles at 90% DoD
Storage Discharge Rate ~3% per month
Charging Temperature 32°F to 115°F
Operating Temperature -4°F to 140°F
Max Continuous Discharge 150A
Max Pulse Discharge 600A
Cranking Amps Rating 1000A

Customer Reviews

Based on 9 reviews
Casey A.
Great battery

I have 2 of the 12v 100ah and they are great run all day and the main thing for me was the smaller size for my boat work flawlessly

Doug T.

12v 100Ah Lithium Battery

Gary A.
Astro Lithium Battery

So far this battery has done everything they claimed it would. Other than the trolling motor, it runs 3 Helix 12s, Mega 360 and everything else on my 2019 ZX 250. It’s summer here in Florida and we run our live wells wide open ALL DAY and my ASTRO LITHIUM Battery never skips a beat.

Michael A.
Awesome Batteries

Purchased 2 100ah for my skiffs’ trolling motor. Impressed by the weight, performance during all day trips. Also, installed a Noco 3 bank charger for the lithiums and the house battery (AGM). Great set up and batteries.

Jack C.
12v100 amp

So far I have had these batteries for 3 months and just as advertised I can run my ultrex for days.

Shipping is free on all batteries and chargers. All products are shipped via UPS Ground. Due to federal regulations, we cannot ship batteries overnight.

In most cases, orders will ship within 1 business day.

8 Year "No Gimmicks" Warranty

To learn why we call our warranty a "No Gimmicks" Warranty, check out this article.

Astro Lithium warrants its batteries against defects in materials or workmanship for eight (8) years from the original date of manufacture, with a minimum 70% retention of Battery capacity over the warranty period. All other products such as chargers and accessories come with a one (1) warranty.

  • During the product warranty period, Astro Lithium will credit, replace, or repair the product if the product is deemed to be defective in materials or workmanship. 
  • This warranty extends only to products distributed and/or sold by Astro Lithium to the original purchaser only. Warranties are non-transferable.
  • This warranty does not cover misuse, neglect, accidental damage, improper installation, or normal wear and tear.
  • This warranty does not cover disasters such as, but not limited to, fire, flood, lightning, improper electric current, or acts of God.
  • Astro Lithium is not responsible for loss of data, time or hardware failure besides our products. Astro Lithium is not responsible any loss work ("down time") caused by a product requiring service.
  • For a battery to be exchanged under warranty, the Astro Lithium manufactured serial number must be present on the battery. Removal of this date code will void the warranty. 
  • This warranty and all agreements shall be governed by and interpreted in accordance with the laws of Florida.


30 Day Money Back Guarantee

Any feelings of skepticism you might have about investing in an LFP battery is completely normal! This is why Astro Lithium makes every effort to absorb as much risk as possible so you're free to make a good decision. We want to make it easy for you to prove that our batteries are quality products backed by quality support.

We want you as our customer to be 100% satisfied. Astro Lithium guarantees you a 30-Day Return window (beginning the date of receipt) to evaluate your purchase.

Within the thirty (30) days, and for any reason, you may exercise your right to return or exchange your purchase. A refund or exchange will be issued once the battery has been returned and all items are accounted for. Returned items are subject to a ten percent (10%) restocking fee.


Our batteries are have been tested to be compatible with all major trolling motor brands such as Rhodan, Minn Kota, Motor Guide, Garmin, Lowrance and more.

For information on which battery to consider for your trolling motors thrust rating, check out our blog post here.


If you have the proper charger, charging lithium batteries is no different than most other battery types. Any charger from us, or any charger with an AGM Charging profile will work perfect. Standard lead acid battery chargers will not allow you to maximize the performance of lithium batteries. Due to their lower operating voltage, a standard lead acid battery charger may only charge your Astro Lithium battery to 60% to 80% of its full potential. We strongly recommend a LiFePO4 rated charger to get the most out of your batteries.

All of our batteries are shipped FREE to the Lower 48 United States. All products ship via UPS Ground.

Yes! This battery is specifically designed and engineered to handle cranking applications.

Mercury has approved lithium cranking batteries for the following motors:

  • 75hp to 300hp Fourstroke, ProXS, SeaPro and Verado models
  • 200hp to 400hp Pro and Verado Models
  • 500hp to 600hp SeaPro and Verado models

Yes, our batteries are great for operating in series or parallel applications.

LFP batteries are very safe. When we hear about lithium battery fires, those are related to other Lithium-Ion battery chemistries. Our batteries are Lithium Iron Phosphate and use a different chemistry that is much more stable.

Lithium iron phosphate has excellent thermal and chemical stability. These batteries stay cool in higher temperatures. They are also incombustible when mishandled during rapid charges and discharges or when there are short circuit issues. Lithium iron phosphate does not experience thermal runaway in the same way that other lithium-ion batteries do, as the phosphate cathode will not burn or explode during overcharging or overheating as the battery remains cool.

While our voltages vary slightly, they are completely fine to work with 12 volt, 24 volt and 36 volt applications.

The variation stems from the nominal voltage of an LiFePO4 cell being 3.2 volts. When assembled in packs, the closest multiples become 12.8 volts, 25.6 volts and 38.4 volts. These voltages are well within the operating limits of 12v, 24v and 36v equipment.

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