Battery is the new form of "fuel" for electric vehicles, you never need to go to gasoline station to refuel your outboard anymore. You only need to recharge your batteries at home or docking place.

Our expandable battery modules will make your life much easier to determine how big the battery bank you need to meet your purpose. You can just buy one battery module first to test performance and find out accurate amp draw for your special application, then you can easily figure out how many such battery modules required to get the EV speed and travel duration you want. You can easily parallel link up to 4 expandable battery modules to form a larger capacity battery bank by using our Scalable Battery Hub (QuadCell). You can use two such hubs to link up to 8 battery modules. Each battery module is light weight for one person to carry around. Each module has its own battery management system (built-in BMS) and charger. We have developed two models of battery module for diffrent electric boats, 48V30AH and 48V50AH. Their features and functions are basically same except they have different capacities. All have its built-in LED meter.

We choose the most safe LiFePO4 battery type for our expanable battery modules, the materials used inside battery cell will not cause any fire or explosion. The quality of cell is very consistent and can last more than 2000 charging cycles. Its C-rating is 3 times, that means a single 48V50AH module can output 150A continuosly. That's why you can buy just one or two battery modules first, to test the motor performance and get amperage to calculate before you know the exact battery capacity you need.

Lithium Battery Packs for Electric Bikes
DLP-01
	Model: DLP-01 (easy installation on common bicycles) Specs: 36V11.6A / 48V11.6A Cell: Panasonic 18650GA 3450mAh Configuration: 10S4P Max Discharge Current: 15-25A Continuous Charge Current: 2-3A Dimension(L*W*H):375*90*83mm 36V11.6AH Pack with Charger ($280) 48V11.6AH Pack with Universal Charger ($338)
DLP-02
	Model: DLP-02 (easy installation on common bicycles) Specs: 36V11.6A / 48V11.6A Cell: Panasonic 18650GA 3450mAh Configuration: 13S4P Max Discharge Current: 15-25A Continuous Charge Current: 2-3A Dimension(L*W*H):340*86*130mm 36V11.6AH Pack with Charger ($290) 48V11.6AH Pack with Universal Charger ($348)
Water Bottle LiMn Battery Packs
	Model: WBB Very Light and Easy Carry Water Bottle LiMn Battery Packs 36V08AH: 2.5kgs, for 35-40km range per charge 24V10AH: 2.1kgs, for 30km range per charge 24V08AH: 1.8kgs, for 25km range per charge Come with mounting bracket, keys, and universal charger WBB-3608M 36V/8AH $215/set WBB-2410M 24V/10AH $198/set WBB-2408M 24V/8AH $179/set
Frog Style Battery Packs
	Model: LFP / LBC Frog Style Battery Pack (LiMn Battery Cells) -- 24V10AH, or 36V10AH
LFP-3610F 36V/10AH $269/set LFP-2410F 24V/10AH $198/set LBC-36U2 Extra Charger $35/set LBC-24U2 Extra Charger $35/set
Cuboid Battery Packs
	Model: LFP / LBC Top Quality LiFePO4 Battery Pack for Electric Bikes -- 24V20AH/36V10AH/36V12AH/48V10AH Large and safe LiFePO4 cells inside Compact in size and light in weight (dimensions) BMS manages to each cell for high reliability Extra long cycle life - 5 times life of Lead Acid and 2 times of NiMH Extremely safe: no explosion, no fire under collision, over charged or short circuit LiFePO4 Battery Pack with BMS/Charger and Optional Sliding Rack Aluminium Casing with Switch/Key -- FREE! BMS and 110V-240Vac 2A Universal Charger Included (optional 4A) Weight: below 5.5Kgs Capacities: 24V/20AH, 36V/12AH, 36V/10AH, or 48V/10AH Max Discharge Current: 35A(12AH)/60A(16AH) Max Continuous Discharge Current: 20A(12AH)/30A(16AH) Charging Cycles: >1000 times Ranges(full electric mode): 40Km(36V12AH) or 55Km(48V10AH) Packing Box Dimensions: 24cm X 24cm X 39cm
LFP-3612S 36V/12AH $316/set LFP-4810S 48V/10AH $396/set LFP-2420S 24V/20AH $349/set LBC-48U3 48V/3A Charger $48/set LBC-36U2 36V/2A Charger $35/set LBC-24U2 24V/2A Charger $35/set RAK-001 Rear Sliding Rack $29/set RAK-002 Seat Post Rack $35/set
Packet Battery Packs
	Model: EP-4815P Safe,Reliable,High current output Free Eco-pack Bag High Capacity e-Bike Battery: 2000W output Materials: LiFePO4(BMS included) Capacity: 48V 15AH C-Rating: 3C (45A) Weight: 8.5 kg Life cycles: >1000 times Pack Size: 25*18*13 cm EP-4815P 48V/15AH $568/set

LiFePO4 Battery Pack for Electric Wheelchair
Eco-pack
	Model: EP-2410F LiFePO4 Lithium Battery Type: Dry Cell Battery Voltage: 24 Volts Capacity: 10 Ah (Ampere Hour) 240 Wh (Watt Hours) IATA Battery Type Code: ELI Weight: 3 Kg Dimensions(W*H*D): 13.3cm x 16.5cm x 8.25cm Buy Now (USD 215.00)
	Model: EP-2415F LiFePO4 Lithium Battery Type: Dry Cell Battery Voltage: 24 Volts Capacity: 15 Ah (Ampere Hour) 360 Wh (Watt Hours) IATA Battery Type Code: ELI Weight: 4.7 Kg Dimensions(W*H*D): 18.4cm x 19cm x 10.2cm Buy Now (USD 318.00)

LiFePO4 Battery Pack with BMS and Charger for electric motorcycles, tricycles
LFP
	Model: LFP4820M Weight: 12Kgs Capacity: 48V/20AH Dimensions: 150*150*300mm Max Discharge Current: 60A Max Continuous Discharge Current: 40A Charging Cycles: >1000 times Model: LFP4830M Weight: 18Kgs Capacity: 48V/30AH Dimensions: 180*190*320mm Max Discharge Current: 90A Max Continuous Discharge Current: 60A Charging Cycles: >1000 times
LFP-4820 48V/20AH $655/set LFP4830M 48V/30AH $890/set ...Credit cards via PayPal...

Self-Managed Exandable Battery Module with BMS for EVs
	Module capacity: 48V50AH Max continuous discharge current: 3C Standard charge current: 0.5C Charging cycle life: >1000 times Stainless Steel Casing You can easily join expandable battery modules to form larger capacity battery packs

Portable & Foldable Solar Chargers
GoldenMotor portable and foldable Solar Charger available in 36V (charing output: 50.8V) and 48V (charging output: 70V). The weight is 12kgs, dimensions: 67*53*8cm after folding. You simply plug and charge your battery pack with sun shine! You can fold the two solar panels and carry it like a suit case, easily place it into your car boot.	MODEL:SCR-4880 (48V 80W) PV Module Electricity Performance Parameter Cell type: 16% efficiency high quality Polycrystalline cell Glass type: Tempered Glass Lamination: EVA,Tedlar Maximum Power(Pmax): 80W Voltage at Pmax(Vmp): 68.6V Current at Pmax(Imp): 1.17A Open-circuit voltage(Voc): 82.9V Short circuit current(Isc): 1.33A Tolerance: 3% MODEL:SCR-3680 (36V 80W) PV Module Electricity Performance Parameter Cell type: 16% efficiency high quality Polycrystalline cell Glass type: Tempered Glass Lamination: EVA ,Tedlar Maximum Power(Pmax): 80W Voltage at Pmax(Vmp): 52.5V Current at Pmax(Imp): 1.53A Open-circuit voltage(Voc): 63.4V Short circuit current(Isc): 1.73A Tolerance: 3% NOTE: POWER MEASURED UNDER STANDARD TEST CONDITIONS: 1000W/M2 AM 1.5 GLOBAL, 25? CELL TEMPERATURE
SCR-3680 36V/80W $345/set SCR-4880 48V/80W $345/set SCR-2480 24V/80W $345/set ...Credit cards via PayPal...

      It is clear that the small capacity Li-ion (polymer) Battery containing lithium cobalt oxide (LiCoO2) offers a genuinely viable option for electronics and digital applications. However, lithium cobalt oxide (LiCoO2) is very expensive and un-safe for large capacity Li-ion Battery. Recently lithium iron phosphate (LiFePO4) has been becoming "best-choice" materials in commercial Li-ion (polymer) Batteries for large capacity and high power applications, such as lap-top, power tools, e-wheel chair, e-bike, e-car and e-bus. A LiFePO4 battery has hybrid characters: as safe as lead-acid battery and as powerful as lithium ion cells. The advantages of large format Li-ion (polymer) batteries containing lithium iron phosphate (LiFePO4) are listed as below:
1. Fast charging:
      During charging process, a conventional Li-ion Battery containing lithium cobalt oxide (LiCoO2) needs two steps to be fully charged: step 1 is using constant current (CC) to get 60% State of Charge (SOC); step 2 takes place when charge voltage reaches 4.2V, upper limit of charging voltage, turning from CC to constant voltage (CV) while the charging current is taping down. The step 1 (60%SOC) needs two hours and the step 2 (40%SOC) needs another two hours. LiFePO4 battery can be charged by only one step of CC to reach 95%SOC or be charged by CC+CV to get 100%SOC. The total charging time will be two hours.

      
2. Large overcharge tolerance and safer performance
      A LiCoO2 battery has a very narrow overcharge tolerance, about 0.1V over 4.2V of charging voltage plateau and upper limit of charge voltage. Continuous charging over 4.3V would either damage the battery performance, such as cycle life, or result in firing and explosion. A LiFePO4 battery has a much wider overcharge tolerance of about 0.7V from its charging voltage plateau 3.4V. Exothermic heat of chemical reaction with electrolyte measured by DSC after overcharge is only 90J/g for LiFePO4 verse 1600J/g for LiCoO2 . The more is the exothermic heat, the larger energy heating up the battery in its abusive condition, the more chance toward firing and explosion. A LiFePO4 battery would be overcharged upto 30V without portection circuit board. It is suitable for large capacity and high power applications. From viewpoint of large overcharge tolerance and safety performance, a LiFePO4 battery is similar to lead-acid battery.

3. Self balance
      Alike lead-acid battery, a number of LiFePO4 cells in a battery pack in series connection would balance each other during charging process, due to large overcharge tolerance. This self balance character can allow 10% difference between cells for both voltage and capacity inconsistency.

4. Simplifying battery management system (BMS) and battery charger
      Large overcharge tolerance and self-balance character of LiFePO4 battery would simplify battery protection and balance circuit boards, lowering their cost. One step charging process would allow to use simpler conventional power supplier to charge LiFePO4 battery instead to use a expensive professional Li-ion battery charger.

5. Longer cycle life
      In comparison with LiCoO2 battery which has a cycle life of 400 cycles, LiFePO4 battery extends its cycle life up to 2000 cycles.

6. High temperature performance
      It is detrimental to have a LiCoO2 battery working at elevated temperature, such as 60C.. However, a LiFePO4 battery runs better at elevated temperature, offering 10% more capacity, due to higher lithium ionic conductivity.

Comparison data among various Lithium base batteries:

	C-LiFePO4	LiCoO2	LiMn2O4	Li(NiCo)O2
SAFETY AND ENVIRONMENTAL CONCERN	Excellent, Best among all existing batteries	Not stable every dangerous	Acceptable	Not stable very dangerous
CYCLE LIFE	Excellent Best among all the listed groups	Acceptable	Unacceptable	Acceptable
POWER WEIGHT DENSITY	Acceptable	Good	Acceptable	Best
LONG TERM COST	Excellent Most economic	High	Acceptable	High
WORKING TEMP.	Excellent -45C¨C70C	Decayed beyond -20C ¨C 55C	Decayed extremely fast over 50C	Decayed extremely fast over -20C ¨C 55C
REMARK	Although, Lead Acid battery is lower in cost and safety acceptable; however, with extremely toxic, worse for the environmental concern, short cycle life, heavy in weight, therefore, we don't put it as a group for comparison. 2.      Nickel Hydride battery has a characteristic of low Power Weight Density, decayed faster under the high temperature, worse in memory effect, not suitable for high output usage. 3.      The C-coated Lithium Iron Phosphate Battery has been proven as the most environmental friendly battery. It is the safest and most suitable for high output usage. It is also the best for storage battery usage.

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