36V 100Ah Lithium Battery
36V 100Ah Lithium Battery

36V 100Ah Lithium Battery

Regular price$1,849.00

  • Bluetooth Monitoring
  • 8-Year Full Replacement Warranty
  • Free Shipping to Lower 48 U.S. States
  • In stock, ready to ship

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Experience immense power for your most demanding applications with our largest battery yet - the 36V 100Ah Astro Lithium Battery. This robust battery is engineered to fuel your nonstop adventures. Power your trolling motors for multiple days between charges, allowing for extended trips on the water with this colossal energy storage solution.

Despite its substantial power, this battery has a surprisingly compact design for its capacity. This 36V battery could alleviate your rig by over 200lbs compared to conventional lead-acid batteries, all the while delivering the same high performance.

But the 36v 100Ah Astro Lithium Battery is not just for trolling motors; it's an ideal choice for powering golf carts as well, offering the longevity you need for multiple rounds on the greens without recharging.

Reliability and durability are at the heart of our engineering philosophy. Our batteries are designed to operate flawlessly even in extreme temperature conditions, ranging from a frosty -4°F to a sweltering 140°F. The built-in Battery Management System (BMS) further ensures optimal protection against overcharging, over-discharging, overcurrent, and overheating.

Choose the 36V 100Ah Astro Lithium Battery, the ultimate powerhouse for your most demanding adventures. Experience the freedom of extended periods on the water or the golf course, all thanks to the substantial power and impressive longevity of our battery.


  • Real-time Bluetooth monitoring for accurate battery performance tracking and diagnostics.
  • 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.

Bluetooth Technology Built-In

  • Standard with built-in Bluetooth monitoring using the Astro Lithium smartphone app.
  • View your batteries state of charge, cycle count, current charge and discharge rates, and much more with state of the art Bluetooth technology.
  • Bluetooth SIG Registered
  • FCC Certified

General Specs


67 lbs

Dimensions (LxWxH)

20.50" x 9.50" x 9.00"

Terminal Type


Cell Type



Electrical Specs

Nominal Voltage 38.4v
Nominal Capacity 100Ah
Energy 3840Wh
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 100A
Max Pulse Discharge 200A

Customer Reviews

Based on 6 reviews
Rosaire N.
Replaced Battery

My 36v 100ah Battery was replaced at no charge including shipping
And replacement is great
Thanks Capt. Ron

Neil A.

Battery performance is incredible! Customer service is top notch.

Michael R.
Great Product and even better customer service

Love the Battery it works perfectly for my trolling motor. Also the customer service is second to none. I have had nothing but a great experience with Astro Lithium and would recommend them to anyone!

Minn Kota

Purchased the 36 Volt 100 ah battery to replace 3 lead acid batteries. I have used it multiple times and has always performed as it should. The customer service is excellent with calling with questions prior to my purchase. Wish I had the Bluetooth monitoring like the new version but I have gone 3 days of fishing with out a charge and have not had a problem.

Thomas D.
Awesome trolling motor battery

24 hours of run time on trolling motor and still only at 60% capacity. I only got 6 hours of run time on three 12 volt deep cycle lead acid batteries. Huge difference.

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.

No. This battery does not have the high cranking amps required to start a boat or car engine. This battery is for deep cycle applicaitons such as operating trolling motors, golf carts, marine electronics, and many more.

Our 36 volt batteries can be run in parellel, but they cannot be run in series. Only our 12 and 24 volt batteries can be operated in series connection.

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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