21*70mm Rechargeable Flashlight Battery 21700 3.7 V Li Ion Battery 4800mah
21*70mm Rechargeable Flashlight Battery 21700 3.7 V Li Ion Battery 4800mah
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Basic Infomation
Place of Origin: China
Brand Name: MEGA
Certification: CB CE SGS UN38.3 UL
Model Number: 21700 battery cell 4800mAh 3.7V
High Light:

Rechargeable Flashlight Battery 21700


3.7 V Li Ion Battery 4800mah


Rechargeable Flashlight Battery 4800MAH

Payment & Shipping Terms
Packaging Details: Standard Package
Delivery Time: 3-5days
Supply Ability: 1000000pcs/day
Warranty:: 3years
Application:: Toys, Power Tools, Home Appliances, Consumer Electronics,
Battery Size:: 21*70mm
Capacity:: 4800MAH
Battery Weight:: 50g
Product Description

High Capacity battery cell Lithium Ion 21700 4800mah 5000mah 3.6v 3.7V ups Battery

1. Excellent abuse tolerance and environmentally friendly.
2. Excellent calendar life.
3. With greater power and energy density and lower impedance.
4. Suitable for a wide variety of applications and system designs.
5. Proven performance in the toughest conditions, combining durability, reliability, and safety
6. Offers an excellent combination of price-performance.​


Factory 21700 battery cell 4800mAh 3.7V Li-ion High Battery CellFactory 21700 battery cell 4800mAh 3.7V Li-ion High Battery CellFactory 21700 battery cell 4800mAh 3.7V Li-ion High Battery CellFactory 21700 battery cell 4800mAh 3.7V Li-ion High Battery Cell

Factory 21700 battery cell 4800mAh 3.7V Li-ion High Battery Cell

1.21700 Lithium cylindrical rechargeable batteries with PCB protection

2.Internal PCB protection (patent pending design) prevents under-voltage at 6.0V and over- voltage at 8.5V.

3.Manufactured under CE,ROHS to assure quality

4.Battery tested before delivery to ensure capacity, quality and lifetime

5.Pollution-Free/Long Cycle Life/Good Consistency

6.No memory effect

7.Existing stock for short delivery time.

8.Factory price, high quality



1. Safety: safest Li-Ion battery, CE ROSH approved, built in PCM/PCB, none fire or explosive

2. Clean and Green energy, no toxic material contained

3. Powerful: Battery can discharge in 15C~20C

4. Long life cycle, 80% capacity remain after 500 times deep cycle.

5. No memory effect,highly efficient charge anytime, no reduction of capacity

6. Operation temperature: -20~70°C

7.Small size, light weight:

8. Good performance at high temperature and high temperature resistance

9. Low self-discharge rate: < 3% monthly




Battery Model 3.7V 4800mAh 21700 Lithium ion battery
Nominal Capacity 4800mah
Nominal Voltage 3.7v
Storage Voltage 3v~4.2v
Charging Cut-off Voltage 4.2v
Discharging Cut-off Voltage 3.0v
Standard Charge Current 0.5C
Maximum Charging Current 1C
Max Discharging Current 1C
Battery Size 21*70mm
Charging Method CC-CV (constant voltage with limited current)

Operating Temperature


Charge: 0 to 50 °C
Discharge:-20 to 60°C


Battery tested:(Item1,2,3 tested under PCB condition)  



Li-ion battery Application  


1.Light: headlamp, emergency light, sloar flashlight, searchlight, lanten,bicycle light, LED light, military flashlight, high-end flashlight, high power flashlight, bright flashlight.

2.Outdoor sports products: camping light, mountain bike light, solor emergency light, self-defense flashlight,

3.Customer electronics: MPS, Tablet PC. laptop, Bluetooth earphone, power bank, portable DVD player,

speaker, microphone, sound equipment, audio, Digital camera, vidican.

4.Home appliances products: electric mop, electric vacuum cleaner, electric children toys, electric shoes, electric blanket.

5.Medical devices

6.Instruments and meters: water meter, gas meter.

7.Electric transportation vehicles: electric bike, electric car, e-scooter, e-motor

8.Power tools: electric drill, mower



Battery Remark:  


1.Never completely discharge lion battery ( below 3.0V under load ).

2.Charge fully to 4.2V before first use.

3.Never use force to install (insert) liion battery.

4.Do not use old and new battery cells together.

5.Use only high quality battery charger.

6.Do not expose to heat.

7.Do not short (connect) positive (top), and negative (bottom) battery terminals.Keep Battery that is not in use in plastic holder.

8.Do not charge battery over 4.2V (another reason to use high quality battery charger).

9.Do not charge unattended.

10.Do not use old, and new cells together.

11.Do not store your liion batteries fully charged (for extended period of time).

12.Store in cold and dry place at approximately 3.7V (storage charge).

13.After battery is discharged-don't leave it discharged=>charge it as soon as possible.

14.Using the battery application equipped,refer to the user’s manual before usage.

15.When the cell is not charged after long exposure to charger, discontinue charging.

16.Battery must be charged at operating temperature range 0 ~ 50°C. Be discharged at -20~60 °C .


1. What Warranty do you have?

12 months Manufacturer's limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.

Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number.


2. What are the available payment terms?

We accept Alipay, West Union, and TT. All major credit cards are accepted through secure payment processor ESCROW.3. What is the lead time?

It depends on the order quantity. Usually, 3 to 5 days for sample and 15 working days for bulk order

4. What are the available shipping methods?

We can ship to you by UPS/FEDEX/DHL/TNT/EMS/HK post, via sea or Air. Other shipping terms can also be arranged according to specific requirements.

21*70mm Rechargeable Flashlight Battery 21700 3.7 V Li Ion Battery 4800mah 5


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Office Add:2203, Strait Pearl Plaza, No.99 Yilan Road, Siming District, Xiamen.
Tel. /wechat/WhatsApp:0086 13063063211    
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