Chargex Lifetime Warranty

For 15 years, we have been manufacturing a wide range of lithium batteries and chargers for thousands of clients, serving diverse applications from marine and RV to aerospace and defense.

Renowned institutions such as SPACEX, BOEING, NASA, Jet Propulsion Laboratory (JPL), General Motors, the US Navy, and the US Air Force depend on us for customized lithium batteries tailored for naval, aerospace, ESS, forklift, and other commercial and mission-critical applications.



United States Navy

Awarded Chargex multiple projects to design and engineer fully customized Class A Lithium Batteries for Naval Military Applications.


Jet Propulsion Laboratories

Unmatched safety is a primary reason multiple projects are underway at JPL utilizing Chargex lithium batteries.



For years we have been the manufacturer of choice selected for multiple projects at NASA.


Nokia Telecom

Awarded Chargex with development of  customized Energy Storage Solutions (ESS) for Telecom Tower UPS Systems.

PLUG AND PLAY - Drop In Replacement Lithium Batteries

Replace lead acid, agm or gel batteries with Chargex plug and play lithium ion batteries. 

Same group sizes as standard lead acid (SLA) - Drop In Replacement.

Wide range of custom lithium batteries for Marine, RV, Golf, Automotive, UPS, Telecom and OEM Applications.

Chargex Lithium Ion Batteries

 Bolted Together For Superior Strength 

Chargex Lithium Iron Phosphate Batteries are manufactured contrastingly superior from the competition with our bolted 32700 Stainless Steel Cylindrical LiFePO4 Battery Cells. 

Each cell is bolted through a rigid lengthway circuit board that strengthens the battery pack and provides superior current conductivity compared to tab welded cells. Chargex lithium battery packs are held together with thick, solid copper bus plates that prevent the pack from bending or warping in extreme conditions further maximizing current conductivity and strength to the battery pack.

CHARGEX® Lithium Iron Phosphate Battery

 Built Tough, Safe, and Dependable 

The Chargex Battery Management Systems (BMS) sets itself apart with top tier MOSFETS and electrical components for maximum efficiency, performance, and reliability. Our BMS modules typically have higher charge and discharge current capability than competitor lithium batteries with the same capacity, this allows you to use our batteries for both deep cycle and starting applications. 

Each BMS has standard features including short circuit protection, reverse polarity protection, low voltage, and over voltage protection. Chargex BMS modules vary across battery models, typically we do not add temperature features that can prevent you from using the battery in low temperatures, while this may reduce the life cycle of the battery, it allows you to keep running your Marine, RV, and electronics regardless of the temperature.

Chargex Lengthway Circuit Boards

 Lengthway Circuit Boards

Chargex Lithium Battery cells are bolted together through Lengthway Circuit Boards that provide rigid strength to the battery pack and connect to the BMS that balances individual cells. 

The Lengthway Circuit Boards will shut down an individual cell in the unlikely event of failure preventing short circuit and allowing the rest of the battery to continue functioning normally, if a single cell fails with a tab welded battery pack, it can short circuit and will cause the whole pack to fail. Other lithium batteries are typically built with tab welded cells that are balanced together as a string of cells.

CHARGEX® Lithium Iron Phosphate Battery

 The 32700 3.2V 5AH LiFePO4 Lithium Iron Phosphate Battery Cell

Chargex batteries are manufactured with 32700 - 3.2V Lithium Iron Phosphate (LiFePO4) Explosion Proof Stainless Steel Cells. Every cell is bolted together for a firm connection and more electrical conductivity compared to the tab welded method.

Each cell has a unique built-in thermal fuse that in the unlikely event a cell is overheating, internally disconnects shutting down the cell and preventing it from overheating. In addition, a high pressure safety vent and flame retardant electrolyte make this one of the world's safest batteries.

  • Explosion Proof
  • High Quality Stainless Steel
  • Thermal Fuse
  • Flame Retardant Electrolyte
  • Hight Pressure Safety Vent

Chargex Lengthway Circuit Boards


Limited Lifetime Warranty

 Our Lithium Batteries are the battery of choice for thousands of companies and consumers around the world. Click here for more info.


Internal Battery Protection System

 Every Lithium Battery comes with an Automatic Built In Battery Protection System (BPS). Click here for more info.


multiple safety redundancy systems

Our LiFePO4 cells are among the safest on the planet and are considered safe and non hazardous. Click here for more info.


Engineered to Last

 Our lithium batteries are used through out the world as a drop In replacement from lead acid, gel and AGM batteries. Click here for more info.


for superior strength, reliability and higher current conductivity

CHARGEX® EnergyWave
Heavy Duty Battery Protection System

Our Lithium Iron Phosphate Batteries are built with a first class Fully Automatic Built-in Battery Protection System (BPS)

This highly advanced internal battery protection system automatically turns the battery off if it's drained below 8V or charged above 16V - preventing accidental over discharge. The Battery Protection System will turn off the battery by sensing a short circuit, reverse polarity, over and under voltage, as well as, over current. This Built-in Battery Protection System maximizes the efficiency and performance of the battery to increase its cycle life. 

Click Here to Learn More About our Built-In Protection System

Tested & Approved: Designed to Replace Outdated Lead Acid, Gel, and AGM Batteries

Plug & Play

Drop-in replacement - same group sizes as standard lead acid batteries. Simply connect your battery cables and you're ready to go.


Connect multiple batteries in series and in parallel to increase voltage, power, and capacity. 

Built-in Battery Protection

Every battery comes with a built-in battery protection system designed to protect and maintain the battery cells.

70% Lighter than Lead

Lithium Batteries average 70% lighter than the same size lead battery. Plus - our batteries don't contain toxic lead, gases, or acid.

100% Depth of Discharge (DOD)

CHARGEX® Lithium Ion Batteries can be discharged to 100% of the rated capacity.

Long Life 3000 - 5000 Cycles

CHARGEX® Lithium Batteries outperform our competitors in quality, safety, reliability, and life.

Over 100,000 Lithium Batteries Sold Worldwide | Thousands of Lithium Batteries In Stock & Ready to Ship


CHARGEX® Lithium Batteries can last over 5,000 cycles and 20+ years. 


Designed and Engineered for all Deep Cycle and Starting Applications


Stainless Steel 3.2V 5.5AH LiFePO4 cells with Thermal Fuse and High Output BMS

100% safe for >13 years 

LiFePO4 Lithium Iron Phosphate Chemistry 100% safe for more than a decade

Lithium Ion Boat Battery


Our marine lithium ion batteries provide both starting power and can allow you to safely use 100% DOD (depth of discharge) for your house bank . With less than 1% a month self discharge, vessels with our batteries can stay fully charged for over a year with no use.

Lithium Ion RV Batteries

| RV

Our Deep Cycle Lithium Ion Batteries are designed for Motor homes, Travel Trailers and Fifth Wheels. Easily upgrade your coach batteries with the industries leading lithium ion battery technology.

Lithium Ion Golf Cart Battery


We manufacture our Lithium Ion Golf Cart Batteries as a drop in replacement from lead acid batteries. Simply take out your old batteries and put the lithium Batteries in the same way, using your existing cables connect the batteries and you are ready to go. 

HAVE QUESTIONS?  1-855-242-7439

Monday - Friday from 8:00am to 6:00pm EST

Thousands Of Satisfied Customers Can't Be Wrong


My battery bank of 4- 12V 100AH Lithium Batteries  work better than expected in my travel trailer. I am able to keep my batteries charged with solar panels allowing me to spend time off the grid. With my 1000 watt inverter I can run all the accessories that I want and have plenty of battery reserve for the evenings.

Purchased this to use as house battery on my boat, I'm really pleased with performance, just wish I had this long ago. I run 2 fridges and small freezer, all work even better than full power from previous pair of batteries as these charge to a little higher voltage. We anchor out lots and so happy to have something that really works well..if you like to anchor out on the hook for any length of time don't hesitate to spend the extra, you'll be so glad you did.

- Martin M.

Had previously bought six 100amp Lithium Ion batteries, for use in my Solar/Wind powered RV. The six batteries have been in use for over one year running 24/7. I wanted an additional battery bank so I bought this 300amp battery. I am completely satisfied with my purchase. So much power in such a light battery and it looks great too. Will be buying a second 300amp battery for a grand total of 1,200amps.

- Cuauhtemoc L.

I am a Captain on a 54' Sport Fishing Boat. The twin diesel engines  take a lot of  Power to start. Typically we go out everyday and start/stop the motors at different fishing locations. throughout the day the batteries would get weaker as some electronics run on it and from starting. Now that we installed the Batteries the  boats engines crank over without any hesitation and have a noticeably faster start. This provides me with confidence in shutting the motors down while off-shore and knowing I have plenty of power to start back up. 

No matter how you play with the numbers, formulas and assumptions - Over the life of the battery, Lithium Ion Batteries cost less than lead batteries. Lithium Battery technology can last up to 5000 cycles. Typically a deep cycle lead battery will only last around 300 - 500 cycles. Meaning you may have to replace your lead batteries over 15 times to equal the life of just 1 Lithium Battery. Lithium Ion Batteries will save you thousands of dollars over the life of your application making this a Smart Investment. Think about all of the money and frustration you have spent on lead batteries. Lithium is a green alternative that is quickly becoming the technology of choice for thousands of people and business's around the world.

Purchased Three - 100AH Marine Batteries 06/2012 and I fish all year long in North Carolina>>>>These Batteries are still as strong as the first day I put them in my Bass Boat. After fishing for stripers in the Cape Fear River for 5 - 6 hours would completely discharge three optimas (the 65 lb. blue tops), But with the Lithium Ions I still have 50% left and they are over 100 lbs. lighter and completely recharge in two hours. After Four 1/2 years that's some great batteries! 

- Bob R., Wilmington NC.

Michael T.

Our firm uses the 12V 100AH Group 31 Lithium Ion Battery in over 40 fleet vehicles and we love them. Currently we have to change out 3 batteries per vehicle every 6 - 8 months due to heavy amp draws our equipment placed on the lead batteries. The Lithium Battery is designed to handle these heavy loads without sacrificing life of the battery, we are expecting over 5 years in our vehicles that would require over 6 sets of lead batteries to last as long as one set of lithium batteries. Eliminating maintenance and downtime of our equipment. We also considered the environmental impact of switching to lithium batteries from lead acid batteries knowing the lithium batteries are non hazardous we are reducing our carbon footprint and getting a much better battery at the same time.

Sean M.

I required a high quality lithium battery to run electrical equipment and for emergency back up power.  These guys were able to assist us in determining the best battery to use based on the power requirements should we experience a power outage. Having a reliable and practical solution is important to keep our systems running in the event of a power outage. Lead acid batteries are hazardous and cannot be used in our factory due to safety concerns with off gassing, Lithium ion batteries were the best option and finding  this company was a quick and easy solution for us. 

Andrew P.

I am an artist and travel in my RV along with my wife  Dawn and our dog Lucy. We are often camping off grid and run our lights and inverter off our lead batteries which would only last for a couple hours running lights and our TV. Our generator auto start turns on is very noisy so we were researching better lead acid batteries for our coach when we came across Lithium Batteries at an RV show in Florida. The benefits of lithium ion batteries vs lead batteries for our coach seemed like an obvious choice considering how much off grid camping we do.  Our coach formerly required 4 - 6V lead acid batteries, The rep at their booth explained we only needed two of there 12V batteries to connect in parallel and that would replace all 4 of our 6V lead batteries due to the lead batteries not being able to be drained more than 50% of their rated capacity, leaving us with 50% unusable dead weight (literally). We decided to go ahead and purchased 2 - SB100 lithium batteries and have been happy we did. Our coach has enough battery power to run our lights and TV as long as we need and have not turned off on us yet. When we camp in cold areas the batteries keep our heater running all night whereas before our generator would cut on in the middle of the night to recharge the lead batteries. We absolutely love the batteries and recommend them for anyone looking to upgrade Their coach batteries. 

 We Carry Thousands of Lithium Batteries in Stock!

Chargex Lithium Ion Batteries