Toy Airplane

Experimental Aircraft Battery source for your aircraft !

Whether you are a first-time lithium user or converting from lead to Lithium, Aerolithium is a name you can trust for your Lithium Experimental Aircraft Battery. Useful load increase by 13+ lbs, Higher nominal voltage and cranking power, dual battery enhancement option and aviation spec Battery Management System for safety and dependability. ASK if other BMS's have overcurrent protection, redundant temp sensors and heat sink for thermal protection , or protection against melting. Contact us today to discuss your next Lithium Aircraft Battery needs.


Turbine start battery RG 380 - 44 replacement, 26 lbs

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Aero C680Li
Aero C680Li

8 or 12Ah in Compact case perfect for all Rotax users.

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Concorde RG24-15 lithium replaement
Concorde RG24-15 lithium replaement

lightweight aluminum case. RG 24-11 replacement

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Turbine start battery RG 380 - 44 replacement, 26 lbs

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experimental lithium aircraft batteries

RFQ custom quotes welcome   /  Aircraft lithium batteries  /  We ship worldwide

yukon flying

A Brand you can Trust

Aerolithium is a high-tech company specializing in the custom design and development of lithium aircraft batteries for the Aviation and Aerospace Industry. Our proven lithium power solutions for experimental aircraft systems enhance performance and reliability. Since 2011 we have been serving the General Aviation and the Experimental market worldwide.

Our lithium cell research is a continuing process to obtain the latest in lithium cell technology and cutting-edge BMS circuitry. We are devoted exclusively to providing the finest Lithium Aircraft Batteries to the flying community. Our newest line of Lithium Smart Batteries set the Gold Standard in reliability, functionality, and value. Aerolithium Aviation Batteries exceed the starting power requirements for all Lycoming, Continental, Rotax, ULPower, Jabiru, PBS TJ100, PT6, Garrett, Walter and other engines.


Compare for yourself and learn why more and more pilots and builders have decided to switch to Aerolithium for their Experimental Aircraft Battery. Your exceptional aircraft deserves an exceptional battery! 

midwest expo light sport expo

Quality of Materials

Quality cells + quality BMS = a quality battery

You have a choice in Lithium Batteries: Choose Wisely!

  • Cells - Cylindrical and prismatic LiFePO4

  • BMS - Advanced, digital, premium features

  • Terminals - Copper  for high current, less resistance vs brass

  • Enclosure - Anodized aluminum 5052, ABS.

  • Operating temps - minus 20 to 65 Celsius

  • Tri-color LED SOC indicator option

  • Voltage - 14.4 and 28.8 systems

  • Specific energy density - 128wh/kg

bulldog plane

Our Signature Features

choice in lithium batteries


Our starter battery Ah sizes are 7.5, 10, 13, 15, 20, and 26ah and up to fit all aircraft and engines.

BMS circuit


Digital programmed software operating system.
Low volume production allows faster adaptation to newer components and technologies.

10Ah and15Ah lithium battery


To accommodate all the various Ah capacities, shapes, and dimensions  clients ask for, we offer a multitude of choices of different cases and terminals

compatible withaircraft electrical systems


Superfast charging = less work for the alternator, BMS regulated and protected for any size alternator/ generator

Bamboo and carbon fiber


 carbon fiber, copper, aluminum

bracket for PC680 lithium battery
drop in replacement lithum battery


Strong protective Aluminum case - no battery box required. Flange / bracket mount any position

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Aerolithium batteries are compatible with all aircraft charging systems as a drop in replacement for AGM batteries. Our BMS will accept the same charging voltage and current.  This acceptance of a higher current does not harm the alternator as it puts out only what it is designed to and the BMS in our battery limits the charging current to its own limit as well. As the battery's voltage increases it forces the current down in the absorption phase. Aerolithium's BMS will protect against any overvoltage / over current during charging.
Any discharging will not be interrupted.
Aerolithium's exclusive over-current protection means our BMS can handle any aircraft alternator without crowbar protection as needed by other sellers.
Self discharge is around 1% a month for the 1st year, then, it can sit for years without degradation. the battery will sit naturally at about 13+ volts for a long time; a 98% discharged state would be anything less than 9.0V. Upon a LVD, simply attach charger; no disconnecting of negative lead or jump starting required.  Use a LiFEpo4 charger at 14.4V.
Aerolithium now uses Active cell balancing.
active balancing of lithium cells
r44 with Aerolithium battery

About LiFePO4

New generation LiFePO4 battery with higher discharge, lower impedance.

Replaces lead at 1/4th the weight

Higher average voltage

Environmentally friendly

Dry cell, no acid

Safe, non-volatile 

flat discharge curve

2000+ discharge cycles

5 - 10 year usable life span

20Ah lithium battery installed into IO550
aerolithium install G1
aerolithium  battery installed


As you already know the primitive lead-acid battery is going the way of the horse and buggy.

Energy storage in a lithium battery has advanced to the point of being very safe; very lightweight, 1/4th or less the weight of a lead battery, a longer life span; thus cheaper than SLA over time.  

No battery tender required, higher resting voltage, higher cranking voltage/amps, cleaner, no gassing / no corrosion, less toxic, and environmentally much greener than lead-acid.
Whether you have a Lycoming or Continental or Rotax or other engines consider that a lithium replacement battery will last 5 times longer, and although costing about 2 x's more than a stock lead battery, it pays off in the long run, while providing the benefits of lighter weight and smaller size. For those infrequent flyers, a charged Aerolithium battery can sit for months and still fire up your engine.

Lithium lightweight airplane starting batteries are for those that want faster acceleration, increased useful load, shorter takeoffs and landings, have weight and balance issues, want less mass/ stress during hard G turns, no maintenance, install anywhere, and like being on the leading edge of technology.  

The Lithium Iron Phosphate chemistry of these batteries is non-hazardous, non-flammable, and non-corrosive. Extremely small self-discharge, no memory like NiCd, and can be serviced/refurbished if ever. These Lithium aircraft starting batteries are a retrofit unit that will work in ANY fixed-wing aircraft, helicopters, light sport planes, experimental aircraft, LSA, and gyrocopters.
Engines with fuel injection or electronic ignition are highly advised to have a backup battery installed. 

Aircraft that can benefit from Aerolithium Batteries