12V 50AH Lithium Ion Battery | Deep Cycle | Engine Starting

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

The Smart Battery 12V 50AH Lithium Ion Battery (SB50) features an automatic built in battery protection system (BPS) that keeps the battery running at peak performance and protects the cells for thousands of cycles. The SB50 is plug and play for any application that currently uses a lead acid, gel or agm battery.

12V-50AH-Lithium-Ion-Battery.jpg Model SB50
Group Size 1250
Nominal Voltage 12.8V
Charge Voltage 14.4V to 14.6V
Max Charge / Discharge Current 50A (amps)
Cold Cranking Amps 500A (amps)
Length 7.75"
Width 6.45%
Height 6.75%
Weight 15 lbs.
Type LiFePO4

Usable Capacity (amp hours) 52AH
  Price: $689.99 Depth of Discharge 100%
 images.jpg  Peak amps 5 seconds 500A
Reserve Minutes @ 20A 150
Reserve Minutes @ 50A 60
Self Discharge <3% a year
BuyNow-Amazon-Button.png 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  Automatic Battery Protection System
Fahrenheit Usable Capacity Low Voltage Disconnect 8V
140 103% Over Voltage Disconnect 15.8V
122 102% Short Circuit Protection Instant
104 100% Reverse Polarity Protection Instant
86 100% Cell Balancing  Automatic
68 98%    
50 92% Cell Specifications
32 83% Connection Bolted
14 80% Type Cylindrical
-4 70% Internal Impedance ≤10mΩ
-22 60%    
-40 10% Warranty
-58 0% Repair or Replace First 5 years 
    Repair or Pro Rate Life Time
    Detailed Warranty Information Warranty
Physical Dimesnions Data Sheet



Why Smart Battery?

  • Cells - Smart Battery products are built with 3.2V 5AH Cylindrical Lithium Ion Cells, Each cell is designed with explosion proof stainless steel, flame retardant electrolyte and a thermal fuse.

  • Consistency - Smart Battery 3.2V 5AH cells are mass produced with production capabilities reaching 500,000 cells per day.

  • Design - Smart Battery cells are bolted together to increase strength, conductivity and quality design of our LiFePO4 batteries. The cells are bolted through length way circuit boards that provide additional strength, balancing and short circuit protection. In the unlikely event one or more cells were to fail the circuit boards will take that cell(s) off line and allow the battery to continue function normally at 12V with little reduced capacity. 

  • Balancing -  Smart Battery cells are grouped together based on 10 consistencies when building each battery pack. The bolted cell design provides a stronger connection for less resistance and more current conductivity. Along with passive balancing through the length way circuit boards, these batteries maintain the highest overall pack capacity and are designed to last 3000 - 5000 cycle. 

  • Reliability - Smart Battery replacement Lithium Ion Batteries have been in production and sold to commercial and consumer markets for nearly 5 years.

  • Customer Service - We are available 7 days a week, late hours and even through the night to support our worldwide client base. Most calls will always be answered by a live Smart Battery representative who is knowledgeable and friendly. If your call is not answered right away we will return your call promptly in the order we receive it.

  • Commitment - Smart Battery® also takes great pride in understanding your concerns and demands, Please let us know how we are doing and any suggestions or comments about our products are highly appreciated.

  • Applications - Smart Battery® products are used in hundreds of applications like Electric Vehicles, RV's, Boats, Cars to Robots, Telecommunications towers, Military and unmanned aerial vehicles. our flawless track record of reliability, consistency and quality is why we are the leading supplier of drop in replacement lithium ion batteries worldwide.






8 Item(s)
12V 50AH Lithium Ion Battery
12V Lithium Ion Battery Charger DP-PS2
12V Lithium Ion Battery Charger DP-PS1
12V Lithium Ion Battery Charger DP-SS1
12V Lithium Ion Battery Charger DP-RS1
8 Item(s)