Q：What makes DOUKAS lithium battery different from traditional lead-acid batteries?

A: Lead-acid battery is a traditional battery, it is mainly made of lead material, it has lead and acid pollution, and the energy density is low. 

DOUKAS lithium battery is a new-style motorcycle battery, which is environmental friendly with no pollution. This battery is made of new lithium iron phosphate positive materials that contains no lead, hydrargyrum (mercury) and sulfuric acid, and energy density is three times more than lead acid battery. Compared to lead acid battery, DOUKAS lithium ion battery is extremely light, much lower self-discharge rate, no sulfated problem, and environment friendly. 

Q:  What’s the difference between DOUKAS lithium battery and other lithium batteries?

A: Compared with Digital lithium battery (such as cellphone battery) and lithium power supply battery (such as E-bike battery), DOUKAS lithium engine start battery have the difference from Materiel. Voltage, Energy density, discharge rate, safety, cycle life, the detail table is follow:

Q：The price of DOUKAS lithium engine start battery is higher than traditional lead-acid starting batteries, why should choose DOUKAS lithium battery?

A: Compared to lead acid battery, the advantages of DOUKAS lithium battery be as follow:

1.       0℉/-18℃ super cold weather performance.

2.       1/3 Weight VS lead-acid batteries.

3.       5 times shelf Life VS lead-acid batteries.

4.       3 times longer cycle life VS lead-acid batteries.

5.       30%~50% higher cranking current VS lead-acid batteries.

6.       Quick charge acceptance.

7.       Intelligence built-in BMS.

8.       Patented robust brass terminal.

9.       Patented durable spacer.  

10.   Patented armoured design.

11.   Easy to read indicator.

12.   Quad terminal design for DKL20 and DKL30.

Q：The capacity of DOUKAS lithium battery is lower than traditional lead-acid battery，so how can DOUKAS lithium battery work and performs better than traditional batteries?

A: DOUKAS lithium battery is made of extremely high energy density lithium iron phosphate material, and it is designed by DOUKAS patent technology. The watt density is 5 times more than existing lead-acid battery, and it can realize the high rate discharge capacity. So even though the capacity is lower than traditional battery, it can be use normally, and perform better than traditional batteries.

Q：I know lead-acid battery models, how do I choose and buy DOUKAS lithium battery?

A: Mostly DOUKAS lithium battery models have the corresponding lead-acid battery, some have same or similar models name, mostly you can find same or similar size of DOUKAS lithium battery to lead acid battery, it can be replaced lead-acid battery directly, check the Compatible Chart for detail information.

Q:  How do I test the cranking performance of DOUKAS lithium battery and traditional battery?

A:  Aside from testing our battery by using in real vehicle, we can also use battery digital testers to do quick test for these two kind batteries.

Q:   Can I use Lead-Acid battery chargers to charge a DOUKAS lithium battery?

A: No. Only use battery chargers designed for 12V lithium-ion batteries with an output voltage between 14.0~14.9V. Using recommended DOUKAS Smart Battery Chargers: DKC2A.

Be cautious of using low-quality chargers, as they may present a severe electrical risk that can result in injury to person and property, as well as shorten the life of the product and cause the product to malfunction. DOUKAS is not responsible for the user’s safety when using accessories or chargers that are not approved by DOUKAS.

During charging, if the battery becomes excessively warm, deforms, swells, or emits smoke or odor, discontinue use immediately and contact support.

Q:   How do you check the remaining capacity for DOUKAS lithium battery?

A:  You can check the battery voltage by press the “TEST” button on battery top to display the battery voltage. Then check corresponding remaining SOC in following sheet:

Q:    If a motorcycle will be stored for a long time, how should DOUKAS lithium battery be maintained？

A: If battery will not be used for more than two weeks, it is better to remove the battery from the vehicles and stored. In order to avoid batteries discharging by tiny current in vehicles, which may cause battery failure by overcharge.

Normally, if the full charge battery is stored one year or longer, the left capacity still can start the motorcycle successfully. Accordingly, it doesn’t need to disconnect the battery and motorcycle cable if no current delivers in the motorcycle when the key is off. Mostly motorcycle models produced by regularly manufacturer do not have the current delivers when the key is off.

If additional security installment or control system in the motorcycle, the motorcycle still delivers the current to keep the clock, computer and security installment operating when the key is off. In this case that the motorcycle is in storage for long time, the battery will be damaged in one week after battery full discharge due to lithium engine start battery low capacity. Please remove the battery or disconnect the battery cable if you do not use the motorcycle for two weeks or longer, In order to avoid batteries discharging by tiny current in vehicles, which may cause battery failure by overcharge. Please measure and confirm the battery voltage is higher than 13V before re-installing the battery, or use dedicated charger to recharge the battery 30min if the voltage is less than 13V.

Q:   Can I use DOUKAS lithium battery normally in low-temperature environment?

A: Lithium batteries cranking performance will be degraded as temperature drops. However, they still react to cranking under -10℃. Lead-acid battery type will increase resistance on each subsequent cranking attempt, until it won’t turn over. If your Lithium Iron Phosphate battery fails to start on first crank, that first start has warmed the battery, and the second attempt will be much stronger, and so on until you get a good start.

Due to our low resistance formulation, the performance of DOUKAS lithium battery under cold conditions is better than other brand lithium battery. During minus 5℃environment temperature, most users can start the motorcycle on first try.

If under low temperature condition, please turn on your motorcycle spotlight after key on, it is good for the batteries because of the current delivery, but the lighting time depending on the temperature. 30 seconds if minus 5℃environment temperature, 4-5 min if minus 5℃environment temperature, this ensures the motorcycle would start on the first try, and protects the battery cycle for longer performance.

Q:   How should DOUKAS Lithium battery be disposed?

A: Our DOUKAS Lithium battery contains no lead or acid; it meets the European ROHS standards for environmental health. Please check with your local authority if LiFePO4 battery is allowed to put into the general dust bin. If so, fully discharge the battery before disposal, Such as using a 12V light until it is no longer lit. We expect that there will also be recycling available in some locations, and more coming in the years ahead.

Q:   Can DOUKAS Lithium battery be mounted in any position?

A: Yes, because there are no liquids in the DOUKAS lithium batteries. Any direction installation is permitted, including upside down.

Q:   How long will our DOUKAS Lithium battery last?

A: That depends on many factors. Under the worst conditions, a lead acid battery may last only a few weeks and under the best about 3-4 years (top-quality brands with regular use). In between you will find a wide variety of user experiences. Our research indicates an average of about 1 to 2 years lifespan for lead-acid. Under the same average usage conditions, we expect DOUKAS Lithium battery to last roughly double, or 3 to 4 years. Under ideal usage and storage conditions, we expect 6 to 8 years to be achievable.

Q:    I heard the news that lithium batteries exploded hurting people. How is the safety of DOUKAS Lithium engine start battery?

A: It is safe to use our DOUKAS Lithium engine start battery. Since it adopt the safe lithium iron phosphate positive material, soft package and heated sealing process. We ensure the battery would not explode or catch fire when using. DOUKAS lithium battery have passed the test of UL lab, and got the certificate; we also passed the CQC quality safety testing of China quality certification center.

Q： How long is the shelf life of DOUKAS Lithium batteries?

A: Compare to lead acid battery (6 months), the DOUKAS Lithium battery can be stored for more than a year.

Q:   How do I know if my motorcycle can use DOUKAS engine start Lithium battery?

A: Lithium battery requires both over discharge and battery overcharge, especially that the charging voltage cannot be higher than 15V. Check the motorcycle charging voltage as follow before installation

Step1: Connect the battery terminal with the motorcycle’s wire, Red wire connect positive, Black wire connect negative, then start the motorcycle

Step2: Connect the charging voltage tester with the motorcycle’s wire. Red wire connect positive, Black wire connect negative, the tester indicate the battery open circuit voltage

Step3: Disconnect battery terminal with motorcycle negative wire, then the tester will indicate the motorcycle output charging voltage, please control the motorcycle rotate speed at 2000 rotate and 5000 rotate, and check the charging voltage, the charging voltage is ok if charging voltage between 14.0-15.0V, and the battery can work normally. The battery cannot be full charged if the charging voltage less than 14.0V, or the battery would be overcharged if the charging voltage above 15.0V. These two status will damage the battery accordingly, the motorcycle charging system shall be repaired before battery installation

Step4: Stall the motorcycle and take off the key, Connect the multimeter (milliamperes mode function ) with battery negative terminal and motorcycle negative output wire in series, Then check the motorcycle power consumption by Milliamperes model. To make sure the current deliver less than 1mA during motorcycle stall

Step5: if the motorcycle passes the above test, the DOUKAS engine starts lithium battery can be installed on the motorcycle.

Q:   Why we say the DOUKAS Lithium battery can save fuel?

A: The voltage of lead acid battery is 12V, the voltage will reduce as the capacity falls as the batteries is operating. This leads to action efficiency weakness of spark plugs. But the voltage of DOUKAS Lithium battery is 13V, and stable. The 1V voltage difference ensures the spark plugs be always in great form. It can improve the efficiency of spark plugs, producing bigger sparks, then the gasoline will be burnt more completely, unit kinetic energy increases the engine torque, which can improve vehicle running kinetic energy, ultimately improving fuel-efficient.

Q: Why we say DOUKAS Lithium batteries are much environmental friendly?

A: The DOUKAS Lithium battery adopts environmental friendly lithium battery materiel, such as lithium iron phosphate, Carbon, plastic etc, which all meet the Europe ROHS test, The DOUKAS lithium contain no Cd, Hg, Cr6+ ,PBDEs or other harmful substance. DOUKAS Lithium battery is a green and environmental friendly product.

Q:   Can DOUKAS Lithium battery be used for cars?

A: At this moment, most of our DOUKAS Lithium batteries are used for motorcycles. We also have higher capacity designed battery, it apply to racing cars application in oversea market by installing a dedicated converter. But existing lithium battery cannot be directly used for cars, Specially cars designed with the battery and automotive engine in same cabin (the heat will affect the battery’s life cycle while the engine is running. Most Japanese cars have this design of the battery and automotive engine being in same cabin). The latest European cars and American cars have the design of engine in front and battery behind). We will develop the battery for larger engines in the near future, such as automotive engine.

Q:   If the dimension of DOUKAS lithium battery is smaller compared to corresponding lead acid battery. How should I install the battery into the motorcycle firmly.

A: We will equip plastic spacer in the box, you can install the spacer at the bottom of battery to adjust the battery’s height, this job can be finished in a few minutes. This ensure DOUKAS lithium battery maintain same size as original battery. Check the details in DOUKAS lithium installation guide.

Q:   If the polarity of DOUKAS lithium battery is different with corresponding lead acid battery. How should I install the battery into the motorcycle.

A: If the battery you selected has Quad terminal, you can adjust the polarity by move the Inter-changable Quad terminal to opposite side. Then you can get the polarity you need. 

Q:  How to feedback a failure?

A: Once the battery has failure in the warranty time, please fill the "Failure report"