Certificates
Certification	CCC/BSMI/CB/CE/FCC Morocco/SEC/CU ROHS NOM/PSB/PSE/NRCS SII/TUV-GS/Ukraine/UL/RCM/ISC SONCAP/KEBS/Serbia Uzbekistan/TUV-S/INSM Kucas/CECP /AU MEPS KCC/NRCan (VI) NOM-029/CU/BIS
Design
Product colour	Black
Features
Purpose	PC
Power supply type	Indoor
Input voltage	100 - 240 V
Input frequency	50/60 Hz
Input current	2.5 A
Output voltage	20 V
Output current	6.75 A
Brand compatibility	Lenovo
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	8 - 80%
Packaging content
Quantity per pack	1 pc(s)
Packaging data
Package width	264 mm
Package depth	110 mm
Package height	53 mm
Package weight	700 g
Weight & dimensions
Cable length	1.8 m
Width	126 mm
Depth	77 mm
Height	22 mm
Weight	550 g

The Lenovo 4X21L38724 is a power supply for PC, specifically designed for indoor use. It functions as a voltage converter and provides the necessary power supply for compatible Lenovo notebooks. The device is finished in black and features a SLIM TIP - EU plug, designed for use in Europe. The technical specifications enable universal use with various power sources, regardless of regional voltage differences.

Applications
This power supply is intended for operation with Lenovo notebooks requiring external power via an AC adapter system. It is designed for use in offices, workspaces, or other indoor environments where stable and safe power supply is required. The operating temperature range of 0 to 40 °C and relative humidity of 8 to 80 % during operation ensure reliable performance under normal indoor conditions. The cable length of 1.8 m provides sufficient freedom of movement for placing the device near the power source.

Functions and Features in Detail
The device converts an input voltage of 100 to 240 V and a frequency of 50/60 Hz into a constant output voltage of 20 V. The output current is 6.75 A, corresponding to a power of 135 W. These specifications are sufficient for powering high-performance notebooks. The input current of 2.5 A is suitable for most power outlets in Europe and other regions with similar electrical standards. Brand compatibility is limited to Lenovo, meaning the device only works with Lenovo notebooks that support this adapter type.

Technical Explanation
The power supply operates as a voltage converter, transforming alternating current from the power grid into direct current required for the internal power supply of the notebook. The input voltage range of 100 to 240 V allows use in various countries without modification. The output voltage of 20 V and current of 6.75 A ensure sufficient power delivery to support notebook operation even under heavy load. The certification includes numerous international standards such as CCC, CB, CE, FCC, UL, RCM, TÜV-GS and others, confirming safety, electromagnetic compatibility (EMC), and compliance with respective local regulations. Adherence to these standards ensures safe operation and usability in various markets.

Compatibility and Accessories
The power supply is specifically developed for Lenovo notebooks and is compatible with devices using the SLIM TIP - EU plug type. It is not suitable for other brands or plug types. Use with other devices may cause damage. The designation SLIM TIP - EU refers to the shape and plug connection required for connecting to the notebook.

Installation and Mounting
Installation is performed by simply plugging the power supply into a socket and then connecting the plug to the notebook. No additional tools or mounting procedures are required. The cable length of 1.8 m allows flexible placement of the device. The dimensions of 126 mm (width), 77 mm (depth), and 22 mm (height) make the device compact and easy to transport. The weight is 550 g, representing a convenient size for daily use.

Operational Advantages
The power supply provides reliable and stable power for Lenovo notebooks. The universal input voltage enables use in various countries without additional adjustments. Certification to international standards ensures safety and EMC compliance. The compact design and low weight facilitate transport and storage. The power output of 135 W is sufficient to support demanding applications during notebook operation.