This DC Laptop Power jack is a 2.5mm center pin power jack. Here's a few of the laptops that this Jack is used with:

ACER - Aspire 1300, 1301xv, 1302, 1304, 1315LT

ADVENT 7081

ALIENNWARE - Area-51M (Model Sentia 244)

ARM - N340S8

ASHTON DIGITAL - Passport 340S8, G550, G551, G710, G730, G731, G732, G736, Passport 2100

BALANCE Digital: a535, 557S, CN6555

COMPAQ PRESARIO - 1000, 1010, 1020, 1030, 4060, 1065, 1070, 1072, 1075, 1080, 1090, 1200, 1210, 1215, 1220, 1230, 1234, 1235, 1236, 1237, 1238, 1240, 1242, 1244, 1245, 1246, 1247, 1250, 1252, 1255, 1256, 1266, 1267, 1272, 1273, 1274, 1275, 1277, 1278, 1279, 1400 series, 1600, 1600t, 1610, 1611, 1615, 1620, 1621, 1622, 1624, 1625, 1626, 1630, 1635, 1636, 1640, 1650, 1655, 1660, 1670, 1675, 1680, 1681, 1682, 1683, 1685, 1687, 1688, 1690, 1692, 1693, 1700, 1800, 1805, 1810, 1825, 1827, 1830, 1900, 2100, 2500, 2700, NX9010, NX9008, NX90xx series(most cases, visual check & measure to confirm)
Compaq Presario: 1000, 1010, 1020, 1030, 1065, 1070, 1072, 1075, 1080, 1090, 1100, 1110, 1400 series, 1600, 1600t, 1610, 1611, 1615, 1620, 1621, 1622, 1624, 1625, 1626, 1630, 1635, 1636, 1640, 1650, 1655, 1660, 1670, 1675, 1680, 1681, 1682, 1683, 1685, 1687, 1688, 1690, 1692, 1693, 1700, 1701, 1702, 1703, 1704, 1705, 1710, 1714, 1715, 1716, 1717, 1720, 1721, 1722, 1724, 1725, 1800, 1805, 1810, 1825, 1827, 1830, 1900, 2100, 2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2109, 2110, 2111, 2112, 2113, 2114, 2115, 2116, 2117, 2118, 2119, 2120, 2121, 2122, 2123, 2124, 2125, 2126, 2127, 2128, 2129, 2130, 2131, 2132, 2133, 2134, 2135, 2136, 2137, 2138, 2139, 2140, 2141, 2142, 2143, 2144, 2145, 2146, 2147, 2148, 2149, 2150, 2151, 2153, 2154, 2155, 2156, 2157, 2158, 2159, 2160, 2161, 2162, 2163, 2164, 2165, 2166, 2167, 2169, 2170, 2171, 2172, 2173, 2174, 2175, 2178CL, 2180, 2182, 2188, 2190, 2191, 2192, 2194, 2195, 2196, 2197, 2198, 2199, 2500, 2505, 2510, 2511, 2512, 2515, 2516, 2520, 2521, 2525, 2526, 2528, 2529CL, 2530, 2535, 2538, 2540, 2543, 2545, 2550, 2555, 2560, 2561, 2565, 2568, 2570, 2575, 2580, 2581, 2585, 2590, 2591, 2592, 2594, 2596, 2597, 2598, 2599 2700, 2701, 2710, 2715, 2720, 3000, 4060, NX9010

CTX EZBOOK - 800 series and more

DELL INSPIRON - 3500

ECS - Green G550, G551, G710, G730, G731, G732, G736

FOSA - N340S8

FUJITSU Siemens Lifebook C Series: C1020
FUJITSU Siemens Amelo-EL series: N243S9

GATEWAY SOLO - 3100

GQ ZX Series: GQ ZX5360, ZX5361, ZX5361A, ZX5362, ZX5501, ZX5530, ZX5531, ZX5532, ZX5570, ZX5572, ZX5580

HYPERDATA - G550, G551, G731, G732, N340S8

HugeBee - Green: 550, 553, 736, 732E, 726

HP OMNIBOOK - 6000 series

HP PAVILION - XT178, XZ133, XZ148, XZ163, XZ275, XZ295, XZ335, XZ355, ZT1000, ZT1155, ZT1172, ZT1182, ZT1185, ZT1192, ZE1000, ZE1100, ZE1110, ZE1115, ZE1130, ZE1145, ZE1200, ZE1201, ZE1202, ZE1210, ZE1230, ZE1250, ZE1260, ZE4000, ZE4234, ZE4236, ZE4239, ZE4300, ZE4307, ZE4500, ZE4420, ZE4600, ZE5000, ZE5100, ZE5170, ZE5155, ZE5160, ZE5185, ZE5200, ZE5236, ZE5300, ZE5385, ZE5600, XH445, XF125, XF145, XF235, XF255, XF315, XF325, XF328, XF335, XU155, ZU175, ZU1155, ZU1175

Omnibook: XE series, XE2 , 6000 Series
XE4100, XE4500, 6000

Hp Pavilion: XZ series
XZ133, XZ148, XZ163, XZ275, XZ335,

Hp Pavilion: XF series
XF125, XF145, XF235, XF255, XF315, XF325, XF328, XF335

Hp Pavilion: XT series
XT115, XT118, XT125, XT128, XT155, XT178, XT183, XT188, XT236, XT276, XT345, XT375, XT395, XT412, XT512, XT545, XT555, XT565, XT575, XT585, XT595, XT4316WM, XT4328CL, XT4345QV, XT5335QV, XT5366WM, XT5377QV,

Hp Pavilion: N series
N3000, N3100, N3110, N3150, N3190, N3200, N3210, N3215, N3250, N3270, N3290, N3295, N3300, N3310, N3330, N3350, N3370, N3390, N3400, N3402, N3410, N3438, N3478, N3490

Hp Pavilion: NX series
NX9000, NX9005, NX9008, NX9010, NX9020

Hp Pavilion: ZT series
ZT1172, ZT1182

Hp Pavilion: ZE series
ZE1000, ZE1100, ZE1115, ZE1145, ZE1200, ZE1201, ZE1202, ZE1210, ZE1230, ZE1210, ZE1250, ZE1235, ZE1250, ZE1260 ZE4000, ZE4200, ZE4100, ZE4935, ZE4400, ZE4100, ZE4101, ZE4102, ZE4103s, ZE4105s, ZE4111s, ZE4115, ZE4120s, ZE4123, ZE4123s, ZE4125, ZE4130, ZE4133, ZE4140, ZE4145, ZE4200, ZE4201, ZE4204, ZE4207, ZE4208, ZE4209, ZE4210, ZE4211, ZE4212, ZE4214, ZE4218, ZE4219, ZE4220, ZE4221, ZE4222, ZE4222AP, ZE4224, ZE4228, ZE4229, ZE4230, ZE4231, ZE4232, ZE4234, ZE4236, ZE4239, ZE4240, ZE4241, ZE4251, ZE4257EA, ZE4258, ZE4261, ZE4262, ZE4268, ZE4271, ZE4274, ZE4278, ZE4281, ZE4282, ZE4284, ZE4288, ZE4292, ZE4294, ZE4298, ZE4300, ZE4301, ZE4302, ZE4305EA, ZE4306WM, ZE4307LA, ZE4308EA, ZE4310, ZE4310EA, ZE4311, ZE4312, ZE4313, ZE4314, ZE4315, ZE4315CA, ZE4315US, ZE4316, ZE4317, ZE4317EA, ZE4318, ZE4318EA, ZE4319, ZE4320EA, ZE4321, ZE4321EA, ZE4322EA, ZE4323EA, ZE4325CA, ZE4325EA, ZE4325US, ZE4326, ZE4328US, ZE4332EA, ZE4333EA, ZE4334EA, ZE4335EA, ZE4335US, ZE4336EA, ZE4345EA, ZE4345US, ZE4347EA, ZE4348EA, ZE4349EA, ZE4351EA, ZE4352EA, ZE4353EA, ZE4354EA, ZE4355EA, ZE4355US, ZE4356EA, ZE4357EA, ZE4358US, ZE4360EA, ZE4365US, ZE4367EA, ZE4375EA, ZE4384EA, ZE4385EA, ZE4386EA, ZE4400, ZE4400, ZE4401US, ZE4402US, ZE4403EA, ZE4404EA, ZE4405EA, ZE4407EA, ZE4408EA, ZE4409EA, ZE4410AK, ZE4410AP, ZE4410CA, ZE4410EA, ZE4411AP, ZE4412AP, ZE4413AP, ZE4414AP, ZE4414EA, ZE4415AP, ZE4415EA, ZE4416AP, ZE4416EA, ZE4417EA, ZE4420CA, ZE4420US, ZE4423EA, ZE4424EA, ZE4424US, ZE4425EA, ZE4427WM, ZE4428EA, ZE4430US, ZE4453EA, ZE4454EA, ZE4455EA, ZE4500, ZE4500, ZE4501US, ZE4502US, ZE4504EA, ZE4505EA, ZE4507EA, ZE4508EA, ZE4509EA, ZE4510AP, ZE4510EA, ZE4510OM, ZE4511EA, ZE4512EA, ZE4513EA, ZE4514EA, ZE4516EA, ZE4518EA, ZE4519EA, ZE4520AP, ZE4520EA, ZE4521AP, ZE4521EA, ZE4522AP, ZE4522EA, ZE4523AP, ZE4523EA, ZE4524EA, ZE4525EA, ZE4525US, ZE4526EA, ZE4530US, ZE4540CA, ZE4540US, ZE4545US, ZE4546SR, ZE4547WM, ZE4550ST, ZE4560US, ZE4565QV, ZE4600, ZE4600, ZE4601US, ZE4603EA, ZE4604EA, ZE4605EA, ZE4610EA, ZE4610US, ZE4612EA, ZE4614EA, ZE4615EA, ZE4630US, ZE4715EA, ZE4718EA, ZE4725EA, ZE4800, ZE5000, ZE5100, ZE5155, ZE5160, ZE5165, ZE5170, ZE5185, ZE5190, ZE5200, ZE5207, ZE5217, ZE5228, ZE5232, ZE5236, ZE5238, ZE5240, ZE5242, ZE5244, ZE5250, ZE5252, ZE5258, ZE5262, ZE5270, ZE5279, ZE5300, ZE5307LA, ZE5315EA, ZE5320AP, ZE5320EA, ZE5325EA, ZE5339EA, ZE5343EA, ZE5344EA, ZE5345EA, ZE5345US, ZE5354EA, ZE5357LA, ZE5360EA, ZE5362EA, ZE5365US, ZE5375US, ZE5385CA, ZE5385US, ZE5395US, ZE5400, ZE5407LA, ZE5410AP, ZE5413EA, ZE5414EA, ZE5415AP, ZE5415EA, ZE5416EA, ZE5417LA, ZE5418EA, ZE5420EA, ZE5425EA, ZE5426EA, ZE5427LA, ZE5430EA, ZE5440EA, ZE5443EA, ZE5445EA, ZE5446EA, ZE5447LA, ZE5451US, ZE5457LA, ZE5460EA, ZE5460US, ZE5462EA, ZE5467LA, ZE5468CL, ZE5470US, ZE5475CA, ZE5477LA, ZE5477WM, ZE5478CL, ZE5490US, ZE5497LA, ZE5500, ZE5501US, ZE5504EA, ZE5505EA, ZE5506EA, ZE5507EA, ZE5510AP, ZE5510EA, ZE5511AP, ZE5511EA, ZE5512AP, ZE5512EA, ZE5513AP, ZE5514AP, ZE5515AP, ZE5515EA, ZE5516AP, ZE5516EA, ZE5517AP, ZE5517EA, ZE5518AP, ZE5519AP, ZE5519EA, ZE5520EA, ZE5521AP, ZE5521EA, ZE5522AP, ZE5523AP, ZE5523EA, ZE5524AP, ZE5524EA, ZE5525AP, ZE5525EA, ZE5526AP, ZE5526EA, ZE5527EA, ZE5528EA, ZE5529EA, ZE5530EA, ZE5531EA, ZE5532EA, ZE5533EA, ZE5534EA, ZE5535EA, ZE5537LA, ZE5547WM, ZE5560US, ZE5565QV, ZE5568CL, ZE5570US, ZE5575SR, ZE5580US, ZE5587LA, ZE5590US, ZE5600, ZE5601AP, ZE5601EA, ZE5602AP, ZE5602EA, ZE5602us, ZE5603AP, ZE5603EA, ZE5604AP, ZE5604EA, ZE5604RS, ZE5605AP, ZE5605EA, ZE5605SR, ZE5607EA, ZE5607WM, ZE5608AP, ZE5609AP, ZE5609EA, ZE5610AP, ZE5610CA, ZE5610EA, ZE5611AP, ZE5611EA, ZE5612AP, ZE5612EA, ZE5613AP, ZE5613EA, ZE5614AP, ZE5614EA, ZE5615AP, ZE5615CA, ZE5615EA, ZE5615SR, ZE5616AP, ZE5616EA, ZE5617AP, ZE5617EA, ZE5617WM, ZE5618EA, ZE5619EA, ZE5620EA, ZE5620US, ZE5622EA, ZE5623EA, ZE5624EA, ZE5626EA, ZE5630US, ZE5631EA, ZE5635EA, ZE5636EA, ZE5637LA, ZE5638EA, ZE5640EA, ZE5645EA, ZE5647LA, ZE5700, ZE5701us, ZE5731us, ZE5738rs, ZE5739cl, ZE7185

IBM THINKPAD - I series 1171, 1200, 1210, 1230, 1250, 1260, 1300, 1330, 1400, 1420, 1480, 1500, 1512, 1540, 1541, 1552, 1560 1700, 1720, 1721 **PLEASE NOTE: (In some cases IBM will use a 2.0mm instead of the normal 2.5mm; must measure the tip of the pin if unsure if 2.0mm or 2.5mm)

MTECH N340S8

NEC 120LT

NORTHGATE / NORTHSTAR- G710, G550, G551, G731, G732

PROSTAR 2200C, 2200T, 2273

PACKARD BELL 7521N

SYNTAX - G732

SAGER - (Various Models, must check visually)

TOSHIBA PC CLUB N243S8

UNIWILL - N244II0, N340S8

WINBOOK - J4-G730, J4-G731, J4-G732