3.63V-4850mAh-18.20Wh-LG-M50-21700 Battery

LG21700 Battery–(LGM50 2170 3.63V )

The LG 21700M50 battery  comes up with a nominal capacity of 4850mAh, the voltage of 3.63V   and the energy of 18.20Wh.

This is an absolutely excellent cell for anyone seeking high performance 21700 cells.


Nominal energy: 18.20 Wh
Minimum energy: 17.60 Wh
Minimum capacity: 4850mAh
Nominal voltage: 3.63V
Standard charging current: 1,455mA
Max charging current: 3,395mA
Charging voltage: 4.2V
Charge interrupt current: 50 mA
Max discharge current: 7.275A
Switch-off voltage: 2.5V
Weight: 68 ± 1 g
Protected: No.
Rechargeable: Yes
Dimensions: 21.1mm x 70.2mm

Application:E-Mobility, Consumer Electronic, Medical Equipment, Measuring Devices, Torchlight  


There shall be no such defects as deep scratch, crack, rust, discoloration or leakage, which may adversely affect the commercial value of the cell.
Diameter : ≤ 21.10 mm

Diameter is defined as the largest data value measured on the “A” area of a cylindrical cell.
Height : ≤ 70.15 mm

lg m50 inr 21700 18.20wh structrue

lg m50 inr 21700 18.20wh structrue

Nominal Specification of LG-21700-M50

ltem Condition/ Note Specification
Energy Std.charge/discharge Nominal 18.20Wh
Minimum 17.6OWh
Nominal Voltage Average 3.63V
Nominal Shipping SOC - 30%
Standard Charge Constant current 0.3C(1,455mA)
Constant voltage 4.2V
End condition(Cut off) 50mA
Max. Charge Voltage - 4.20 ± 0.05V
Max. Charge Current 0~25℃ 0.3C(1,455mA)
25~50℃ 0.7C(3,395mA)
Standard Discharge(Refer to 4.2.2) Constant current 0.2C(970mA)
End voltage(Cut off) 2.50V
Max. Pulse Discharge Power Pulse Power(10sec),25C±2C ≤ 80W(SOC 80%)
Max. Discharge Cuent -30~-20℃ 0.2C(970mA)
-20~5℃ 0.3C(1,455mA)
5~45℃ 1.5C(7,275mA)
45~60℃ 1.5C(7,275mA)
Weight Without washer 68.0 ± 1.0g
Storage Temperature(for shipping state) 1 month -20~60℃
3 month -20~45℃
1 year -20~20℃

Performance Specification

4.1.1 Standard Charge

Unless otherwise specified, “Standard Charge” shall consist of charging at constant current of 0.5C. The cell shall then be charged at constant voltage of 4.2V while tapering the charge current. Charging shall be terminated when the charging current has tapered to 50mA. For test purposes, charging shall be performed at 23ºC ± 2ºC.

4.1.2 Standard Discharge

“Standard Discharge” shall consist of discharging at a constant current of 0.2C to 3.0V. Discharging is to be performed at 23 ºC ± 2 ºC unless otherwise noted (such as capacity versus temperature).

4.1.3 Fast Charge / discharge condition

Cells shall be charged at constant current of 0.5C to 4.2V with end current of 50mA. Cells shall bedischarged at constant current of 0.5C to 3.0V. Cells are to rest 10 minutes after charge and 20 minutes after discharge.

Item Condition / Note Specification
Initial AC Impedance Cell shall be measured at 1kHz after charge per Standard Charge ≤ 25 mΩ, without PTC
Initial DC Resistance Cell shall be charged per standard charge and discharged to the SOC (states of charge) 50%. Measurement of internal impedance under DC loads at constant current of 0.5C for 30 sec at 25 ºC ± 2 ºC. 30 ± 6 mΩ, without PTC
Initial Energy Cells shall be charged per standard charge and discharged per standard discharge within 1h after full charge. ≥ 17.6 Wh
Cycle Life Cells shall be charged and discharged per high drain charge rate 500 cycles. A cycle is defined as one charge and one discharge. 501st discharge power shall be measured per standard charge and standard discharge. ≥ 70 % (of Cmin in 2.1)
Self Discharge Cells shall not show evidence of internal short circuits or high self-discharge rates upon receipt. Non-conforming cells will be identified by measuring OCV of minimum 100 cells from a given lot to determine the nominal OCV for that lot of cells at the time of measurement. Cells that deviate more than 5 standard deviation from the mean lot OCV will be rejected and returned to LG for replacement.
Item Condition / Note Specification
Storage Characteristics Cells shall be charged per standard charge and stored in atemperature-controlled environment at 25°C ±2C for 30 days. After storage,cells shall bedischarged per standard discharge to obtain the remainingcapacity.* Capacity remaining rate≥ 90% of Cmm in 2.1
High TemperatureStorage Test Cells shall be charged per standard charge and stored in atemperature-controlled environment at 60°C for1 week. After storage,cells shall be dischargedper standard discharge and cycled per discharge condition for 3 cycles toobtain recovery capacity. No leakage,Capacity recovery rate ≥80%
Thermal Shock Test 65°℃(8h)- 3hrs→-20C(8h) for 8 cycleswith cells charged per standard charge After test, cells aredischarged per standard discharge and cycled per discharge condition for 3cycles to obtain recovery capacity. No leakage. Capacity recovery rate ≥80%
TemperatureDependency of Cells shall be charged per standard charge at 25℃ ±2°Cand discharged per standard discharge at the followingtemperatures.
Capacity Charge Discharge Capacity
25℃ -10℃ 70% of Cmin
0℃ 80% of Cmin
25℃ 100% of Cmin
60℃ 95% of Cmin

* Remaining Capacity : After storage, cells shall be discharged with standard condition(4.1.2) to measure the remaining capacity.

** Recovery Capacity : After storage, cells shall be discharged with standard discharge condition(4.1.2), and then cells shall be charged with standard charge condition(4.1.1), and then discharged with standard discharge condition(4.1.2). This charge / discharge cycle shall be repeated three times to measure the recovery capacity


1). Do not disassemble, dispose of in fire, heat or short circuit.
2).Do not insert batteries with the(+)and(-)reversed.
3). Do not mix fresh batteries with used batteries.
4).Do not submerge the battery in water

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