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Black Smart 3.7v 4400 mAh Li ion Battery Pack High Capacity

Black Smart 3.7v 4400 mAh Li ion Battery Pack High Capacity

Black Smart 3.7v 4400 mAh Li ion  Battery Pack High Capacity

Product Details:

Place of Origin: China
Brand Name: DELONGTE
Certification: CE,ROHS,FCC,MSDS
Model Number: DEL-2S1P

Payment & Shipping Terms:

Minimum Order Quantity: 100pcs
Packaging Details: Standard Export Package
Delivery Time: 5-8 working days
Payment Terms: T/T, Western Union, L/C
Supply Ability: 10000pcs per day
Detailed Product Description
Voltages: 3.7v Capacity: 4000mah 4400mah 5200mah
Batery Type: A Grade 18650 Cell Battery Case: Plastic
Warranty: One Year Delivery Way: FEDEX,TNT,UPS,by Sea,by Air
Cycle Life: More Than 500times Output Port: DC 3.5*1.35mm (Customized)

Black Smart 3.7v 4400 mAh Li ion  Battery Pack High Capacity

Nominal Voltage3.7V
Working Voltage3V-4.2V
Nominal Capacity4400mah
Charge Cut-off Voltage4.2V
Charge Current1A
Standby Current≤15μA
Max. Output Power15W MAX
Operating Efficiency≥99%
Loading Resistance5Ω-200Ω
Charge MethodCC/CV-Constant Current/Constant Voltage
Charge Temperature0℃—40℃
Discharge Temperature-20℃~+60℃
Charge Duration1-3hrs(Standard)
Cycle Life TimeAbove 500 cycles
Power Self-Consumption7.5-14.2uA
Internal ImpedancePCB Internal Impedance<80mΩ, Battery Internal Impedance <180mΩ
Output TerminalDC/1.35*35mm ,DC: 7mm

Power Indication:
Press the black button(Power) to check the power level:
1 LED blinking : Remaining Capacity<=20%
1 LED light:     Remaining Capacity <=40%
2 LED light:    Remaining Capacity <=60%
3 LED light:    Remaining Capacity <=80%
4 LED light ;    Remaining Capacity <=100%
Charging Instruction

  • Please plug the charger in AC 100~240V plug base, now the indicator light of the charger turns green.
  • Please plug DC connector of the charger into the DC socket of electric heating apparel ,now the indicator light in charger turns red. 
  • When the battery is fully charged, the indicator of the charger turns green.

1.Our battery is sent out with a little or no power, so please charge it for about  3 - 4 hours before using.When we shipment, we only charged 30-50% power.
2  Do not overcharge or overdischarge batteries .It will decrease the batteries’s service life.
3  Do not short circuit,incinerate and disassemble batteries.
4  Do not impact the battery.
5  Do not drop of cause unnecessary shocks to the batteries
6. Do not carry loose batteries in a pocket or purse with metal objects like coins,paper clips etc.  
7. Do not use inferior charger to recharge this battery in case of damaging the battery.
8. Do not put the battery in the charger too long.
9. Put it beyond the reach of children.
10.The picture only reference, detailed picture will see the actual battery.
Advantages of  recommendations

  • 12 months Manufacturer's Warranty . Buy with confidence!
  •  Each cells with high capacity of the limited size
  • With cells to make up a pack ,and between the cells,there is good quality match.which is achieved through strict control technics procedure.
  • Shortcut delivery----we can supply you products within a week.
  • Circumspect after service-- if there is quality problem,we can give you  replacement.
  • Specific dual chargers for you.---considering when battery be used for gloves ,two be used at the same time.Our engineers design dual chargers for you.Which can offer you charging at  the same time and  with cc/cv standard.
  • Temperature protection switch inside the lithium battery, when its temperature is at 65--75°C,the protection circuit works and the battery shutdown.
  • Color is customized with black,red,white…

Warranty Instruction:
1. Product that used normally according to specification have one-year guarantee for free repair and replace, in that it goes wrong due to quality. By the way, warranty period starts from purchase date.
2. If there is any damage, please don’t dismantle it. Sent it back to us for repair, and we will give you response or send off within one week after receiving.

Contact Details
Shenzhen Delong Energy Technology Co.,LTD

Contact Person: Jessie

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