2,750mA (continuous discharge) 8,250mA (not for continuous discharge) 45.0g max. Height : 65.00mm max. Diameter : 18.40mm max. Charge : 0 to 45 (recommended recharge release < 45°C)Discharge: -20 to 60 (recommended re-discharge release < 60°C) 1.5 year -20~25°C(1*) 3 months -20~45°C(1*) 1 month -20~60°C(1*) The double-concave lens is similar to the plano-concave lens. The focal length is negative, but the parallel incident light diverges outward. The two side surfaces of the double-concave lens have the same radius of curvature, and are generally used for beam expansion and projection. Double Concave Lenses,N-Bk7 Bi-Concave Lens,Quartz Biconcave Lens,Optical Bi-Concave Lens Bohr Optics Co.,Ltd , https://www.bohr-optics.com
Specification
NO.
Item
Specifications
1
Nominal Voltage
3.65VÂ (0.2C discharge)
2
Nominal Capacity
2850mAh (0.2C, 2.50V discharge)
3
Charging Voltage
4.20 ± 0.05 V
4
Nominal discharge capacity
2000mAh Charge: 1A, 4.20V,CCCV 100mA cut-off, Discharge: 0.2C, 2.5V discharge cut-off
5
Standard charge
1,375mA
6
Max. charge current
2,750mA (not for cycle life)
5
Rapid charge
CC-CV, 4A, 4.20 ± 0.05 V, 100mA cut-off
6
Charging time
Standard charge : 3 hours
7
Max. discharge currentTemperature cut-off 70°C
8
Discharge cut-off voltageEnd of discharge
2.5VÂ ( 2.5V discharge cut-off is better in cycle life )
9
Cell weight
10
Cell dimension
11
Operating temperature(surface temperature)
12
Storage temperature(Recovery 90% after storage)
Key Application
Widely applied in  Electric Bicycle, Electric vehicle, Electric Tricycle, Electric scooter, Electric golf trolley, Electric car, Electric wheelchairs,two wheel vehicles and etc.
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Payment Terms
1.We accept bank transfer(T/T) ,PayPal,Cash.
2.If you prefer other payment method,please contact us by email.
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Shipping Terms
1.Samples order: sending by Express ( DHL/ UPS/ FEDEX/ TNT )
2.Bulk order: sending out by air/express/sea.
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Warranty Instructions
1.We provide 2 years Warranty.
2.Warranty code: quality problems, defective goods can be fixed or replacement; Man-made damage, inflowing water, fault operation leading to short circuit or burning, damaged by carrier is out of our warranty.
3.Goods should be returned in original condition to qualify for a replacement or repair.
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Advantages
1.OEM&ODM manufacture, design any of special shape, dimension and other requirements battery packs.
2.Good quality, competitive price, fast delivery, excellent service.Â
3. Wonderful package, stable shipment, 100% testing and inspection before shipment to insure the quality.Â
4.CE, RoHS, UN38.3, UL, MSDS certificates.
5. Quick action&response,every inquires will be relied within 24 hours.
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Model.
Description
Weight(g)
discharge
USAÂ K2Â IFRÂ 18650PÂ 3.2V
1200mAh
45
30C/60C
IFRÂ 18650PÂ Â Â Â Â Â Â Â 3.2V
1100mAh
45
20C/30C
IFRÂ 18650EÂ Â Â Â Â Â Â Â 3.2V
1500mAh
45
3C/5C
USA K2 26650Ev    3.2V
3200mAh
85
5C/10C
USAÂ K2Â 26650PÂ Â Â Â Â 3.2V
2600mAh
85
30C/60C
IFRÂ 18650PÂ Â Â Â Â Â Â Â 3.2V
1500mAh
45
15C
IFRÂ 38120SÂ Â Â Â Â Â Â Â 3.2V
10Ah
330
5C/8C
IFRÂ 38120PÂ Â Â Â Â Â Â Â 3.2V
10Ah
330
10C/20C
ICRÂ 18650EÂ Â Â Â Â Â Â Â 3.7V
2200mAh
45
3C
ICRÂ 26650EÂ Â Â Â Â Â Â Â 3.7V
4000mAh
82
2C
ICRÂ 26650EÂ Â Â Â Â Â Â Â 3.7V
4500mAh
82
2C
ICR26700EÂ Â Â Â Â Â Â Â Â 3.7V
5000mAh
85
2C
SAMSUNGÂ INR18650-13P/13LÂ
1300mAh
44.5
10/20C
SAMSUNGÂ INR18650-15KÂ Â Â Â
1500mAh
44.5
10C
SAMSUNGÂ INR18650-15QÂ Â
1500mAh
44.5
12C
SAMSUNGÂ INR18650-15MÂ Â
1500mAh
44.5
18C
SAMSUNGÂ INR18650-13QÂ
1300mAh
44.5
15C
SAMSUNGÂ INR18650-20QÂ Â
2000mAh
44.5
8C
SAMSUNGÂ INR18650-20RÂ Â
2000mAh
44.5
11C
 SAMSUNG ICR18650-22FMÂ
22OOmAh
45
2C
SAMSUNGÂ ICR18650-22PÂ Â 3.7V
2200mAh
45
5C
SAMSUNGÂ ICR18650-26F/26FM/26H
2600mAh
45
2C
 SAMSUNG ICR18650-28A Â
2800mAh
45
2C
 SAMSUNG ICR18650-29EÂ
2900mAh
45
2C
     SAMSUNG ICR18650-30A/30B
3000mAh
45
2C
     SAMSUNG ICR18650-32A Â
3200mAh
48
2C
Panasonic NCR18650PF
2900mAh
45
2C
Panasonic NCR18650BD
3200mAh
47
3C
Panasonic NCR18650B
34OOmAh
45.9
1C
Panasonic NCR18650A
3100mAh
45
2C
LGÂ 18650Â HE2
2500mAh
48
12.5C
LGÂ 18650Â D1
3000mAh
48.5
2C
LGÂ 18650Â C2
2800mAh
48
2C
LGÂ 18650Â B4
2600mAh
48
2C
LGÂ 18650Â S3
2200mAh
48
2C
LGÂ 18650Â MF1
22OOmAh
48
5C
The image formed by the biconcave lens is always smaller than the upright virtual image of the object. The biconcave lens is mainly used to correct myopia. Myopia is mainly due to the deformation of the lens, which causes the light to gather in front of the retina prematurely. The double-concave lens plays a role of diverging light. The double-concave lens becomes an upright, reduced virtual image, which makes the image distance longer and just falls on the retina.
18650 2900mAh Rechageable Lithium Battery
Model NO.: BB-18650 29E
Rechargeable: Chargeable
Brand: Samsung
Original: Korea
Battery Type: 3.7V 18650 2900mAh
Dimension: 18*65mm
Application: Electric Bike, Other Battery Packs
Trademark: Samsung
Transport Package: Standard Carton Package
Specification: CE, RoHS, UN38.3
Origin: Shenzhen
HS Code: 8506109000
18650 2900mAh Rechageable lithium battery