Lithium-ion batteries are rechargeable batteries in which lithium ions move from the anode to the cathode during discharge and back when charging. They are popular batteries for use in consumer electronics because they provide good energy density, no memory effect, and a slow loss of charge when not in use. These batteries come in a wide variety of shapes and sizes. In addition, compared to lead-acid batteries, Lithium-ion batteries are lighter and provide a higher open circuit voltage, which allows for power transfer at lower currents and excellent for engine starting applications. These batteries have the following characteristics:

• Very light weight, up to 80% less than a conventional, comparable lead acid battery.
• Lasts 300-400% longer than lead acid.
• Faster engine turn-over for better starts.
• Lower shelf discharge rate (2% vs. 5-8% /month).
• Drop-in replacement for your OEM battery.
• Expect 10-12 years of battery life that will reduce your operating cost by half that of lead acid.
• No explosive gasses during charging, no acid spills.
• Environmentally friendly, no lead or heavy metals.
• Safe to operate!

The term “Lithium-ion” battery is a general term. There are many different chemistries for Lithium-Ion batteries including LiCoO2 (cylindrical cell), LiPo, and LiFePO4 (cylindrical/prismatic cell). Aegis Battery mostly focuses on design, manufacturing, and marketing LiFePO4 batteries for its starter and energy storage batteries. Lithium nickel manganese cobalt oxide (NMC) is used for some custom applications.

Lithium Iron Phosphate (LiFePO4) batteries provides several advantages over traditional Lithium-ion batteries based on LiCoO2. LiFePO4 batteries provide much higher specific capacity, superior thermal and chemical stability, enhanced safety, improved cost performance, enhanced charge and discharge rates, compact size, light weight, and enhanced cycle life. LiFePO4 batteries can offer a cycle life of over 2,000 charge cycles!

Lithium-ion batteries provide multiple advantages over standard lead-acid batteries for engine starting use that we’ll outline below:

• • Substantially lighter – Lithium-ion batteries are just a fraction of the weight of the original lead-acid battery.
  • More powerful – Lithium-ion batteries operate at a higher voltage than standard lead-acid battery, giving you faster engine turn over for better starts. Lead-acid batteries drop to just 12.5V when only 20% of the battery capacity is used, but lithium-ion batteries provide over 12.8V even when only 20% of the battery capacity is left.
  • Low self-discharge rate – Lead-acid batteries lose 4%-25% of their charge every month depending on the quality of the plates and separators used. If you leave a vehicle unattended for a month, the lead-acid battery might lose so much power that the vehicle might not start. On the other hand, our lithium battery chemistry loses less than 3% of charge per month. You can go for several months without having to worry.
  • Environmental Friendly – Aegis Battery batteries contain no toxic substances. There is no toxic, poisonous lead, no corrosive sulfuric dangerous acid and as a result, no possible way for an explosive gassing event that occurs with lead-acid batteries. In addition, there is no need to maintain acid levels and worry about venting as traditional Lead-Acid batteries do. Aegis Battery batteries can be installed in any orientation and the only maintenance involved is just to ensure the battery never gets beyond 80% drained to ensure optimal life.
  • Long lasting – Cheap lead-acid batteries usually only last 1 to 2 years while gel and AGM lead-acid batteries last 3-5 years with proper maintenance. However, Aegis Battery’s lithium batteries can provide 10-12 years of use, easily exceeding the life of any lead-acid battery. Battery life depends purely on proper operation and maintenance, so use common-sense and ensure the battery does not drain beyond 80% discharge. If you are replacing a lead acid battery in two years or less due to deep cycling damage, you will save money in the long run moving to an Aegis Battery lithium-ion battery.
  • Fast recharging – Aegis Battery lithium batteries can accept charge current at up to 5x faster than a lead acid battery. What’s more, the charge efficiency is about 75% for lead acid in contrast to 97% for Aegis Battery’s lithium battery. That means less energy needed to charge and less strain on your alternator.

1) “ENERGY” – Aegis Battery’s “ENERGY” has an internal cell balancing circuit that is processor controlled inside each of its “ENERGY” batteries to maximize the performance and life of the battery pack. No expensive charger maintainer is needed to do cell balancing service. Lithium-ion cells over time will drift having different capacity, some having higher voltages. Without our cell balancer, individual lithium-ion cells within the battery would have voltage drift over time. This imbalance would reduce performance and battery life.

2) “POWER”- Aegis Battery’s “POWER” has the same features (cell balancing) as the “ENERGY” but with additional features. Aegis Battery’s “POWER” has a processor controlled Battery Management System (BMS) inside each case to monitor each cell to prevent over charging, over discharging (voltage draining too low) along with cell temperature monitoring. Should any of the cells reach outside of its allowable specifications, the terminal power will turn off. These are added performance and convenience features to prevent a battery from being damaged or in the event a battery is left unattended for a long time. These added features also prevent the battery from overcharging when attached to other charging equipment or charging failure.

In the “POWER” models, the processor controlled Battery Management System (BMS) has the ability to provide reserve engine start-up power when needed. At motorcycle rallies or gatherings, owners of heavily accessorized motorcycle often want to keep their radios or lights on when parked, possibly draining standard lead-acid batteries too much. The “POWER” automatically senses excess drainage status, shutting all accessories off, while maintaining sufficient reserve power to start the engine. This is known as Aegis Battery’s “IQ RESTART TECHNOLOGY”- Adequate reserve power is left in the battery, to automatically detect starting effort with a key cycle and allows users to start the engine again and not leaving you stranded or with the headache of calling for service or even needing to replace the battery. A significant advantage of the ‘POWER” technology and a major selling point is the “IQ Restart Technology”.

Aegis Battery utilizes the latest advancements in Lithium-ion battery technology along with custom features to provide you with the best battery for your vehicle:

• Internal cell balancing circuit – Aegis Battery has a processor controlled, internal cell balancing board inside each of its “ENERGY” and “POWER” starter batteries to maximize the performance and life of the battery pack
• Battery Management System (BMS) – Aegis Battery’s “POWER” has the same features (cell balancing) as the “ENERGY” but with additional features. Aegis Battery’s “POWER” has a processor controlled Battery Management System (BMS) inside each case to monitor each cell to prevent over charging, over discharging (voltage draining too low) along with cell temperature monitoring. Should any of the cells reach outside of its allowable specifications, the terminal power will turn off. These are added performance and convenience features to prevent a battery from being damaged or in the event a battery is left unattended for a long time. These added features also prevent the battery from overcharging when attached to other charging equipment or charging failure.
• IQ Restart Technology – At motorcycle rallies or gatherings, owners of heavily accessorized motorcycle often want to keep their radios or lights on when parked, possibly draining standard lead-acid batteries too much. The “POWER” automatically senses excess drainage status, shutting all accessories off, while maintaining sufficient reserve power to start the engine. Aegis Battery’s “IQ RESTART TECHNOLOGY”-automatically detect starting effort with a key cycle and allows users to start the engine again and not leaving you stranded or with the headache of calling for service or even needing to replace the battery. A significant advantage of the ‘POWER” technology and a major selling point is the “IQ Restart Technology”.
• FREE CHARGER/Maintainer included – Aegis Battery provides a FREE charger with every new “ENERGY” and “POWER” starter battery that can be used as a battery maintainer/tender when vehicles are not used many months at time.
• Unique Aluminum quad-terminal design – Another design unique to the Aegis Battery’s is an aluminum quad-terminal design which allows for one battery to adapt to two different mounting positions as well as maximizing weight savings using aluminum material. This helps carry reduced manufacturing and dealer costs. Whereas in the past, you had to get a specific battery for your application based on polarity and loosing nuts that slide out. Aegis Battery’s design allows for easy installation.
• Best Engineering – Aegis Battery are the result of years of our own research and development with years of testing. Aegis Battery lithium-ion battery packs have been designed from the “ground up’ to be a powersports starter battery with long lifespan and high performance, under a wide range of temperatures. While other cells may crank a vehicle successfully, they were not originally intended for the high current discharges in starter systems. As a result, cranking performance suffers compared to Aegis Battery and the batteries will wear out. Combined with our strict quality control and mass production technologies allow us to make the best batteries at the most attractive price points.
• Prismatic cells – Cylindrical cells only come in certain sizes, which limit the possible shapes and sizes of the starter battery case designs. As such, battery fit into many vehicles may be poor, or impossible as they are too wide, or too tall and create internal hot spots. Aegis Battery prismatic cells, on the other hand, are rectangular packages which we can freely design and size according to the size requirements of the battery case. As such, Aegis Battery offers perfect drop-in fit in most vehicles along with having better thermal management properties.

Lead-acid batteries used for starting purposes are designed only to provide the maximum current to start your vehicle. Typically lead acid starter batteries can only be discharged about 20%~25% before the plates begin the process of disintegration (sulfating). Any further than that will quickly reduce the total life of the battery. Therefore, a lead-acid battery rated for 15Ah has only about 3~3.75Ah of usable capacity. Aegis Battery lithium-ion batteries have 1/3 the internal resistance of a similar capacity lead acid battery and they can be safely discharged to 90% DOD. Lead acid internal resistance rises as they are discharged; the actual capacity which can be used may be as little as 20% of the mfg. rating. Discharge in excess will not only damage the lead-acid battery, it may not allow proper starting as voltage sags. Aegis Battery’s lithium batteries hold a higher voltage during discharge. An Aegis Battery lithium-ion battery in a starting application can replace lead acid batteries of 3x the size in capacity. Therefore the capacity (Pb Eqv) is a way of comparing the starting capacity lithium battery can do vs. a lead acid battery. If you have a 12Ah lead acid battery in the vehicle today, you can safely replace it with a 12Ah (Pb Eq) battery from Aegis Battery for engine starting applications.

CCA, or Cold Cranking Amperes, is defined as the amount of current a lead-acid battery can provide at 0°F (-18°C) for 30 seconds and maintain at least 1.2V per cell, which for a 6 cell 12V lead acid battery equates to 7.2V. The idea behind this definition is, in colder environments, batteries cannot push out as much current, starter motors have to overcome greater resistance from the lubricants having higher viscosity and fuel ignition is harder to achieve. Problem is, 7.2V isn’t enough to start an engine in a vehicle with a 12V power system and as such, the CCA is no more than an arbitrary figure, and one that is most misused and misrepresented. What really starts a vehicle is current multiplied by available voltage which is power (Watts)! Once again, because Aegis Battery batteries have so much less internal resistance it is able to deliver more voltage for a given amp draw, and thus more usable starting power. Both lead-acid and lithium-ion cells have increased internal resistance as the temperatures fall. Lithium batteries have more internal resistance in extreme cold, temperatures of 0°F (-18°C) or lower, however, the batteries can be warmed up much quicker simply by putting a load on the battery, such as turning on your headlights for 15 to 30 seconds. Since Aegis Battery batteries have substantially lower mass than lead-acid batteries, they warm up much quicker and can deliver their normal crank ratings

Lithium-ion batteries do increase in resistance more as temperature drops, compared to lead-acid thus reduce performance at first start. However, they also react to cranking under cold conditions in a much better way. Lead-acid will increase resistance on each subsequent cranking attempt, until it won’t turn over. If your “ENERGY” or “POWER” fails to start the engine on first crank, that first crank has warmed the battery, and the second attempt will be much stronger, and so on until you get a good start. If your headlight comes on at key-ON, it is good for the batteries to flow some current before cranking in cold weather. We suggest leaving the headlights on ~ 30 seconds before cranking 40F (5C), 30 seconds. That will help wake the battery and increase cranking performance. At 0F (-17C), leave the lights on for 2~3 minutes before cranking. The result will be a better first crank, and longer battery life. Any other accessories that can be turned on before cranking can also be used for this purpose, such as heated gear, radio, etc. With Aegis Battery’s tender plugged in it will increase the internal cell temperature to help with cold starts.

Aegis Battery is providing a FREE charger/tender with every new starter battery purchased with cables. A fully charged lithium-ion battery can sit for a year or more and still retain adequate starting capacity, without damaging the battery. As such, any vehicle that has no current flowing when the key is OFF should never need a tender. However, newer vehicles may have a significant draw even when the key is OFF, to maintain clocks, computers, navigation, pumps etc.

Thus, Aegis Battery is providing a FREE charger/tender with every new “ENERGY” and “POWER” battery purchased. We want to provide maximum battery life and performance for all your vehicles that might not be used very often or have a vehicle drain. If you know that you will go a number of weeks or months without riding, you can either attach our Aegis Battery charger/tender, or disconnect the negative cable from the battery. Aegis Battery’s lithium-ion battery chargers have been designed to work together with the internal cell balancing board in “ENERGY” and the BMS in “POWER” batteries that have special algorithms to prevent over-charge and maximize life of the battery. We have a very simple approach, all the cell balancing maintenance is done automatically either while running your bike or when the charger is attached. Aegis Battery does NOT recommend using lead acid chargers for LiFePO4 batteries. Lead acid batteries charge at 2.30V to 2.45V per cell whereas LiFePO4 batteries require 3.60V per cell. Your battery would potentially be undercharged, so you will not get to use the full capacity of the LiFePO4 battery, nor will balancing be triggered in the LiFePO4 battery pack, both of which are not desired. Furthermore, the floating charge of the lead acid charger is not expected by the battery and can cause problems. Lead Acid trickle chargers should not be used. Use Aegis Battery’s charger that is provided.

If you charge your “POWER” battery above 15V for 12V battery, the BMS inside the battery terminal will turn off. The cut-off voltages settings will vary slightly depending on current levels, temperature and part tolerances. To turn ON the battery again, disconnect the charging source and let the battery rest for several seconds (~30sec). It should come on, in the event the 12V battery had voltages higher than 18V the internal BMS is damaged and will not turn ON.

Yes. There are no liquids in the “ENERGY” or “POWER” batteries. Because the chemistry is a solid, the battery can be mounted in any direction and there are no worries about lead plates cracking from vibration. All batteries on our product list can be mounted in any orientation.

Every battery of ANY chemistry has the potential to fail, sometimes catastrophically and catch on fire. In addition, lithium metal batteries which are more volatile and not rechargeable should not be confused with lithium-ion batteries. However, our lithium-ion chemistry, lithium iron phosphate (LiFePO4), is the safest on the market having the highest thermal runaway threshold temperature from all the different types of lithium batteries. Remember, there are many lithium-ion chemistries and variations. Some are more volatile than others but all have made advances in recent years. Also note that all lithium-ion batteries undergo rigorous UN testing before they can be shipped worldwide further insuring their safety.

There are several factors that affect battery life. Weather, temperature, recharge cycles, depth of discharge (DOD), discharge current, charging current, charging method, vibration and duration of static use can all have dramatic effects on battery life. A properly maintained “ENERGY” or “POWER” battery should last roughly three times as long as lead-acid used in similar conditions.

Yes. These batteries are designed and developed to be used for powersports applications, but they may be useful for many other applications. However, our warranty only extends to appropriate powersports applications. If you have a question about applications other than powersports use, please call us and our customer service professionals will be happy to help.

We have no solid introduction date in mind for automotive versions at this time, but we do plan on having more battery models available in the near future to be used in cars as well. The higher PB Eqv Ah batteries will start vehicles but will have limited reserve energy.

One of the primary benefits of Lithium Iron Phosphate (LiFePO4) batteries is that they discharge at an incredibly slow rate (10% per year of static use) so it is very hard to discharge the battery in a conventional application with an on board charging system. If for some reason you discharge your “ENERGY” battery, the best thing to do is to recharge it as soon as possible. You should not allow the battery to discharge below 9.0V, as this can damage the cells. If the battery is drained below 6.0V then the battery is considered to be discharged beyond its capacity and it should be discarded according to local land fill regulations. Do not discharge below 9V to avoid damage. The “POWER” will prevent the battery from discharging too low and turn off the terminal power. Simply turn the key for an “IQ RESTART” or connect an Aegis Battery charger for the “POWER” to be able to use the battery again.

Aegis Battery recommends that you purchase a single battery that meets your voltage and capacity requirement to avoid any problems. However, the “ENERGY” batteries can be put in series for higher voltages but the “POWER” can NOT be put in series for higher voltages. Both the “ENERGY” and “POWER” can be put in parallel to increase capacity and starting amps.

No. One of the advantages to the Lithium Iron Phosphate (LiFePO4) chemistry is that it generates its own internal heat energy. The outside temperature of the battery pack itself will get no warmer than a lead-acid equivalent in normal use.

At the moment, Lithium-ion materials are about 3~4 times higher than lead acid for the same capacity. This will no doubt come down as worldwide supply goes up.

No. Lithium-ion batteries are especially susceptible to cell damage when they are empty. Aegis Battery chargers will reduce the output current when it detects a lithium-ion battery at a very low SOC. This being the case, jump starting would send uncontrolled amperage into a very low lithium-ion battery causing damage to the cell. Please do not do that.

YES. The “ENERGY” and “POWER” will perform as a direct replacement for your lead acid battery. Our battery cases match most OEM battery case sizes and padding has been provided in the event you need to raise the battery slightly. All equivalency charts and applications guides are based strictly on battery performance with our quad terminals.

We have a complete application chart HERE, in which you can select the correct application for your powersports vehicle based on year, make, and model, or as a lead-acid equivalent. If your application is unique please feel free to contact us at Aegis Battery and our customer service professionals will be happy to guide you.

1. ithium-ion batteries are subject to disposal and recycling regulations that vary by country and region. Always check and follow your applicable regulations before disposing of any battery. Please contact Rechargeable Battery Recycling Corporation (www.rbrc.org) for U.S.A. and Canada, or your local battery recycling organization to properly dispose of your batteries. Many countries prohibit the disposal of waste electronic equipment in standard waste receptacles. Place only discharged batteries in a battery collection container. Use electrical tape or other approved covering over the battery connection points to prevent short circuits.