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 Lithium Ion (Li-Ion) Cells

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Samsung  Cylindrical Lithium ion Specs

Cell Type Diameter Length Rating

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Price Incl VAT
Samsung INR18650-25R

Max Continuous Discharge 20A
18mm 65mm 2500mAh R108.30
Charge Time Standard (min), 0.5C 180min 134min
Rapid (min), 4A 60min 55min
Charge Current Standard current (A) 1.25 1.25
Max. current (A) 4.0 4.0
Discharge End voltage (V) 2.5 2.5
Max. cont. current (A) 20 20
Max. momentary pulse
(A, <1sec)
100 100
Rated discharge Capacity Standard (mAh) (0.2C) 2,500 2.560
rated (mAh) (10A) 2450 2.539
Samsung ICR18650-22P

Max Continuous Discharge
10A
18mm 65mm 2200mAh R108.30
Charging Current
Standard charge: 1075mA
Rapid charge : 2150mA
Charging Time
Standard charge : 3hours
Rapid charge : 2.5hours
Max. Charge Current 2150mA
Max. Discharge Current 10A Contiuous
Discharge Cut-off Voltage 2.75V
Samsung ICR18650-22F
Max Continuous Discharge 4.4A 18mm 65mm 2200mAh Samsung ICR18650-22F R86.64
Charging Current
Standard charge: 1100mA
Rapid charge : 2200mA
Charging Time
Standard charge : 3hours
Rapid charge : 2.5hours
Max. Charge Current 2200mA
Max. Discharge Current 4400mA
Discharge Cut-off Voltage 2.75V

Lithium Ion Protection  Circuits

Lithium ion cells have an operating voltage range from 2.8v absolute minimum to 4.2V absolute maximum. Charging the cells beyond 4.2V will cause them to heat up and ultimately explode and ignite. Discharging a cell below 2.8v will damage the cell rendering it useless. A protection circuit is essential to keep the cells in balance and ensure proper charging and discharging.

These circuits are suitable for hobbyists wanting to use Lithium polymer and Lithium ion cells. We do not accept liability/responsibility for the safety of operation of these circuits and suggest that when charging check the voltage balance and heating of any cells frequently during the charging period.

Single Cell Protection Circuit
Price R25 plus VAT = R28.50
Two Cell Protection Circuit
Price R37 Plus VAT = R42.18
Three cell Protection Circuit
Price R80 plus VAT = R91.20
Three cell Protection Circuit 7Ah
Price R150 plus VAT = R171
Four Cell Protection Circuit

Price R98 Plus VAT = R111.72
 

Lithium Ion Chargers

A lithium ion cell operates in the voltage range min 2.8V to 4.2V Max per cell. This means you need a 4.2V charger to charge a single cell properly to full voltage. Two cells in series will need an 8.4V charger, 3 cells will need a 12.6V charger and 4 cells ,16.8V.

Applying a voltage significant higher than the required voltage will activate the protection circuit prematurely and it will shut down the charge before the cell reaches full charge.

We have the following Lithium ion chargers

Our range of chargers show a red led while charging and changes to green when fully charged.

We also build lithium ion packs according to your spec - Call us for quotes.

Charger pricing per table below

1 Cell - 4.2V 2Ah R182.40

2 Cell - 8.4V 2Ah R222.30

3 Cell - 12.6V 2Ah R242.82

4 Cell - 16.8V 2Ah R273.60

Single 18650 cell charger

Rating 4.2V 550mAh

Price R79.80 Incl VAT

Note: Cell not included

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