System Specs for LENOVO ThinkPad W520 Series (w/4 SODIMM)
Type of System:	Laptops / Notebooks
Bus Architecture:	USB
CPU Type:	Intel Core i7
Standard Memory:	1 GB or 2 GB or 4 GB (Removable)
Maximum Memory:	4 GB  using a 32-bit Operating System / 32 GB using a 64-bit Operating System
Memory Expansion:	4 Sockets

System Memory

Description	OEM Part No.	eFetcher Part No.	Regular Price	Web Price	Availability	Details	Order
1GB Memory (PC3-8500, DDR3-1066MHz, 1.5v)	51J0551, 57Y4385, 43R1987, 43R2045, 55Y3706, 43R1989, 55Y3712, KTL-TP1066/1G	EKLENH20	$21.00	$11.00	In Stock	Product Info
2GB Memory (PC3-8500, DDR3-1066MHz, 1.5v)	51J0552, 57Y4386, 43R1988, 43R2046, 55Y3707, 43R1969, 55Y3713, KTL-TP1066/2G	EKLENH21	$31.00	$21.00	In Stock	Product Info
2GB Memory (PC3-10600, DDR3-1333MHz, 1.5v)	55Y4416, 55Y3710, KTL-TP3B/2G	EKLEN575	$31.00	$21.00	In Stock	Product Info
4GB Memory (PC3-8500, DDR3-1066MHz, 1.5v)	51J0494, 55Y3708, 51J0493, 55Y3714, KTL-TP1066/4G	EKLENH22	$51.00	$41.00	In Stock	Product Info
4GB Memory (PC3-10600, DDR3-1333MHz, 1.5v)	55Y3711, 55Y3717, KTL-TP3B/4G	EKLEN576	$51.00	$41.00	In Stock	Product Info

Batteries & Adapters

Description	OEM Part No.	eFetcher Part No.	Regular Price	Web Price	Availability	Details	Order
High Performance Lithium Ion Main Battery Pack 4600mAH, 6 cells, 51 Wh	42T4235, 42T4702, 42T4703, 42T4704, 42T4706, 42T4708, 42T4731, 42T4732, 42T4733, 42T4734, 42T4735, 42T4736, 42T4737, 42T4752, 42T4791, 51J0498, 51J0499, 57Y4185, B-5115, 0A36302-BTI, 42T4791-BTI, LN-T430X6, LN-T430X6-OE, IB-T410, LLN216	EBLEN-4737	$55.00	$45.00	In Stock	Product Info
High Performance Lithium Ion Main Battery Pack 7800mAH, 9 cells, 85 Wh. This battery has a bigger physical size and 65% more run time than our part number BLEN-4737	42T4702, 42T4703, 42T4704, 42T4706, 42T4708, 42T4731, 42T4732, 42T4733, 42T4734, 42T4735, 42T4736, 42T4737, 42T4752, 42T4791 51J0498, 51J0499, 57Y4185, 0A36303-BTI, 45N1011-OE, 42T4853-BTI, IB-T410X9-6, IB-T410X9, LN-T430X9, B-5115H, LLN216X	EBLEN-4737H	$59.00	$49.00	In Stock	Product Info
AC (Power) Adapter 170 Watt AC Adapter	0A36227, 42T5288, 42T5289, 45N0113, 45N0117	EACLEN-C80A	Call	Call	In Stock	Product Info
Auto/Air Notebook Power Adapter	n/a	EAALEN-C12	$49.00	$39.00	In Stock	Product Info

Notebook Internal Hard Drives

Description	OEM Part No.	eFetcher Part No.	Regular Price	Web Price	Availability	Details	Order
80 Gigabyte Hard Drive	n/a	EKLEN-80.0SA	$62.00	$52.00	In Stock	Product Info
100 Gigabyte Hard Drive	n/a	EKLEN-120.0SA	$71.00	$61.00	In Stock	Product Info
160 Gigabyte Hard Drive	n/a	EKLEN-160.0SA	$69.00	$59.00	In Stock	Product Info
250 Gigabyte Hard Drive	n/a	EKLEN-250.0SA	$92.00	$82.00	In Stock	Product Info
320 Gigabyte Hard Drive	n/a	EKLEN-320.0SA	$95.00	$85.00	In Stock	Product Info
500 Gigabyte Hard Drive	n/a	EKLEN-500.0SA	$107.00	$97.00	In Stock	Product Info
64 Gigabyte SSD Hard Drive SSD (Solid State Drive)	n/a	EKLEN-64SA-S01	$87.00	$77.00	In Stock	Product Info
128 Gigabyte SSD Hard Drive SSD (Solid State Drive)	n/a	EKLEN-128SA-S01	$122.00	$112.00	In Stock	Product Info
256 Gigabyte SSD Hard Drive SSD (Solid State Drive)	n/a	EKLEN-256SA-S01	$222.00	$212.00	In Stock	Product Info
512 Gigabyte SSD Hard Drive SSD (Solid State Drive)	n/a	EKLEN-512SA-S01	$389.00	$379.00	In Stock	Product Info
LAPTOP HARD DRIVE DATA TRANSFER KIT GIGAPLUS-DUA USB Kit can be used to transfer data from existing laptop hard drive to a new hard drive .	GIGAPLUS-DUA	EGIGAPLUS-DUA	$67.00	$57.00	In Stock

External Hard Drives

Description	OEM Part No.	eFetcher Part No.	Regular Price	Web Price	Availability	Details	Order
EXTERNAL USB PORTABLE HARD DRIVE KIT: GigaPlus-500LU Kit comes with 500GB 2.5" external hard drive and can be installed using USB port. Uses laptop power to maintain portability. The new drive can be used to store more data as well as a backup device.	GIGAPLUS-500LU	EGIGAPLUS-500LU	$128.00	$118.00	In Stock