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  • Some of our clients who depend on high quality - reliable lithium ion batteries include.
  •  General Motors
  •  The United States Coast Guard
  •   The United States Navy
  •  Schneider Electric
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12V 300AH Lithium Ion Battery | Deep Cycle | Engine Starting

A Drop In Replacement & Upgrade from AGM, Gel or Lead Acid Batteries.

Smart Batteries are the Ideal battery for any application that currently uses a AGM, GEL or lead acid battery. Smart Battery gives you the ability to upgrade your current batteries to lithium ion technology that can last over 5000 cycles and has tremendous advantages in weight, performance, reliability and life compared to that of traditional lead acid batteries.

12V 300AH Lithium Ion BatteryPrice: $3,499.99

Call for availability 1-855-465-4844

Model SB300
Nominal Voltage 12.8V
Capacity (amp hours) 300AH
Charge Voltage 14.4v to 14.6V
Max Charge / Discharge Current 100A (amps)
Cold Cranking Amps 3000A (amps)
Length 19.25"
Width 10.25"
Height 8.75"
Weight 93 Lbs.
Type LiFePO4

Usable Capacity (Amp Hours) 300AH
Depth of Discharge 100% DOD
Peak Amps 5 seconds 3000A (10C)
Reserve Minutes @ 20A 900
Reserve Minutes @ 50A 900
Self Discharge 0 for 1 year
Capacity % @ 100 Cycles 102%
Capacity % @ 500 Cycles 96.3%
Capacity % @ 1000 Cycles 90.8%
Capacity % @ 1500 Cycles 85.4%
Capacity % @ 2000 Cycles 80.1%
Temperature Performance
Celsius Fahrenheit  Usable Capacity 
60 140 103%
50 122 102%
40 104 100%
30 86 100%
20 68 98%
10 50 92%
0 32 83%
-10 14 80%
-20 -4 70%
-30 -22 60%
-40 -40 10%
-50 -58 0%
Cell Specificiations
Connection Type Spec.
Bolted Cylindrical 3.2V 5AH LiFePO4



Automatic Battery Protection System
Low Voltage Disconnect 8V
Over Voltage Disconnect 15.8V
Short Circuit Protection Instant
Reverse Polarity Protection Instant





Cell Features Internal Design MSDS Flyer
Smart Battery internal cells design 12V 100AH Lithium Ion Battery Protection System
Why Buy Smart Battery LiFePO4.jpg Smart Battery Sales Sheet



The Smart Battery SB300 offers state of the art technology "Lithium Iron Phosphate" the safest and most robust lithium chemistry. Capable of reaching over 5000 cycles, The SB300 can be re-charged thousands of times providing 100% DOD (depth of discharge) The Smart Battery SB300 is perfect for boats, trolling motors, cars and almost any application that would use a 12V 300AH lead acid, agm or gel battery. 

Smart Battery Lithium Ion Batteries are Green, Non Hazardous and have about 30% more energy density in the same size case as a lead battery. Because your lead batteries can only be drained to 80% and are only recommended to drain down to 50% - In some cases the Smart Battery can produce over 50% more usable energy than the same size lead battery.
As you may know, Your existing lead based batteries are inefficient, obsolete and a problem waiting to happen. Typical Lead Acid Batteries have many problems including: they loose up to 30% of their energy per month from self discharging. They have a severe voltage drop when a load is placed on them, they can off-gas, leak acid and hazardous chemicals, do not last long, they are very heavy and made of a toxic material. 

Smart Battery Lithium Ion Batteries are 99.9% efficient, Provide over 100% usable energy of the rated capacity, and lose less than 1% per month self discharge.

Whether you are installing a new Solar System, replacing your Marine Boat Batteries or outfitting a commercial application, Smart Battery Lithium ion Batteries give you the chance to do energy storage right from day one. Most Important for you are the facts that Smart Batteries can last over 5000 cycles meaning you buy a Smart Battery once and you are done. And considering their longevity and the efficiently they are less costly than the heavy and toxic lead acid batteries.

If you want to "go green" the lithium ion Smart Batteries are not only virtually indestructible but they are non-toxic. The Smart Battery is readily available direct through Smart Battery or by contacting one of our local distributors closest to you. This fantastic technology is making our planet a better and cleaner environment. 

Why Smart Battery?

Safety Leader

From start to finish, Smart Batteries are mass produced in one of the world's largest lithium ion battery factories, With over 3000 employees we are capable of producing up to 800,000 cells per day in full production. 

Battery Protection System

Every Smart Battery comes with a powerful built in automatic battery protection system (BPS). Designed to protect the battery cells, the High Power BPS prevents the battery from over discharge by shutting down if the voltage drops to 8V, This prevents damage from low discharge. The BPS also has over voltage protection, short circuit and reverse polarity protection. All of these features increase the overall safety and reliability of the battery while keeping it running at peak performance for thousands of cycles.

Our 3.2V 5AH Cylindrical Cells are mass produced for high consistency and quality. The cells bolt through lengthway circuit boards that transfer energy keeping each cell at peak performance for thousands of cycles. The bolted design provides rugged strength for extreme durability in the worlds most demanding environments.

Each 3.2V 5AH cell is made of explosion proof stainless steel and has a built in safety fuse that will internally disconnect if a cell is over charged or short circuits. The lengthway circuit boards will remove that cell offline and the battery will continue to function normally with slightly reduced capacity. The cells also have a flame retardant electrolyte that eliminates the risk of fire and a high pressure safety valve to allow the cell to safely discharge In the event of short circuit. The cells that make up each 12V battery are matched based on 10 consistencies. Matching the cells increases the overall quality, life and performance of the battery.

About Us

Recognized worldwide as the #1 manufacturer of 12V Lithium Ion Batteries, Smart Battery is a global leader in advanced lithium ion battery technology. Each year thousands of Smart Batteries are used by hundreds of the world's leading manufacturer's in aerospace, military, commercial, OEM and consumer applications. Located in Tampa FL Smart Battery is continuing to forefront the industry with innovation and proven reliability.

VIDEOS                                                                                         DATA SHEET

     SB300 Data

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