Power Port

NOTE! This page is incomplete, expect mistakes. The power port is strictly used for charging and powering ThinkPads. Most newer ThinkPads do not use a dedicated power port, however. Instead, they use a USB Type-C port (24-pin) compliant with Power Delivery specifications for charging purposes. Please note that not all power ports featured on ThinkPads are the same. Some of them are of the 'special' variety, which are not common and may be rare. For example, most IBM ThinkPads utilized the common 5.5 x 2.5 mm coaxial power connector. However, a few of them did not. One such example is the G40 and the G41, which used a Singatron 2MJ-3432-007 Mini-DIN-4 connector. In some cases, an adapter can be used to work-around with an incompatible power port. Most importantly, not all power ports featured on ThinkPads use the same voltage as well. There are some models which employ odd voltages, due to their circuitry and/or design differences. Also, this voltage difference cannot be worked around with an adapter, as most adapters are generally passive which do not modify the output voltage to match the voltage required by the ThinkPad. It is highly recommended to either use the original AC adapter meant for the said ThinkPad, or use an AC adapter with the correct output voltage. Using an AC adapter with a higher output voltage may damage the ThinkPad's charging circuit or blow a fuse and render the entire machine unusable. On the other hand, using an AC adapter with a lower output voltage may cause instability. As for amperage, this would be the least important. However, it is still recommended to use an AC adapter with an amperage that matches the ThinkPad's amperage. Otherwise, the AC adapter may overheat (due to its circuitry being overloaded) and/or cause the ThinkPad to charge slowly (due to insufficient power). If the said ThinkPad is solely running off the AC adapter as its main power source, it will become unstable and potentially unusable. Sometimes, the symptoms could be very severe to the point that the internal display panel would flicker, or the operating system would crash (due to incorrect calculations or unstable components).

Connectors and AC Adapters

Due to the potential crowding of connector sizes and AC adapter power ratings, the arrangement will be done in this format: [connector outer diameter] x [connector inner diameter] [measurement], [connector type]

Assume that the connector has no signal pin, unless noted.

11.0 x 4.5 mm, rectangle with signal pin

Remark: This connector is common. Some NEC AC adapters make use of them, mostly the modern NEC AC adapters. Dimensions are unconfirmed.

AC Adapters featuring this connector

• Lenovo 20V 230W AC Adapter
• Lenovo 20V 170W AC Adapter
• Lenovo 20V 135W AC Adapter
• Lenovo 20V 90W AC Adapter
• Lenovo 20V 65W AC Adapter
• Lenovo 20V 45W AC Adapter
• Lenovo 12V 36W AC Adapter

Signal Pin Definitions

Wattage	Resistance
300 W	8,600 Ω
230 W	4,600 Ω
170 W	1,900 Ω
135 W	1,000 Ω
90 W	550 Ω
65 W	280 Ω
45 W	120 Ω
36 W	7,300 Ω

5.5 x 2.1 mm, semi-hexagon 4-pin

Remark: This connector is uncommon, but adapters do exist for this connector. Dimensions are unconfirmed.

AC Adapters featuring this connector

• IBM 20V 56W AC Adapter
• IBM 20V 50W AC Adapter
• IBM 20V 40W AC Adapter
• IBM 20V 35W AC Adapter
• IBM 20V 30W AC Adapter
• IBM 16.5V 23W AC Adapter

Singatron 2MJ-3432-007, Mini-DIN-4

Remark: This connector is uncommon, but adapters do exist for this connector.

AC Adapters featuring this connector

• IBM 16V 120W AC Adapter

7.5 x 5.55 mm, coaxial with 0.8 mm signal pin

Remark: This connector is very common. Adapters are easy to locate, although their tips may be colored differently.
Be careful of this connector's 2nd variant (right image), which has two plastic tabs that disallows insertion in models that are not rated for 170 W. You could dremel or pry the plastic tabs off using a flathead screwdriver, however.

AC Adapters featuring this connector

• Lenovo 20V 170W AC Adapter
• Lenovo 20V 135W AC Adapter
• Lenovo 20V 90W AC Adapter
• Lenovo 20V 65W AC Adapter

Signal Pin Definitions

Wattage	Resistance
170 W	1,500 Ω
135 W	0 Ω
90 W	Not Connected
65 W	10,000 Ω

6.3 x 4.0 mm, coaxial

Remark: This connector is uncommon, but adapters do exist for this connector.

AC Adapters featuring this connector

• Lenovo 20V 230W AC Adapter
• Lenovo 20V 170W AC Adapter

6.3 x 3.6 mm, coaxial

Remark: This connector is uncommon, so adapters may be difficult to locate.

AC Adapters featuring this connector

• IBM 18V 15W AC Adapter

6.3 x 3.0 mm, coaxial

Remark: This connector is common. Some Toshiba AC adapters make use of them, most particularly the Toshiba 15 VDC AC adapters.

AC Adapters featuring this connector

• IBM 16.3V 30W AC Adapter
• IBM 15V 29W AC Adapter
• IBM 15V 26W AC Adapter
• IBM 15V 20W AC Adapter
• IBM 10.8V 19W AC Adapter

5.5 x 2.5 mm, coaxial

Remark: This connector is very common. Adapters are easy to locate, although their tips may be colored differently.

AC Adapters featuring this connector

• IBM 16V 72W AC Adapter
• IBM 16V 56W AC Adapter
• IBM 16V 54W AC Adapter
• IBM 16V 35W AC Adapter

5.5 x 2.1 mm, coaxial

Remark: This connector is uncommon, but adapters do exist for this connector.

AC Adapters featuring this connector

• IBM 19V 45W AC Adapter
• IBM 10.5V 11W AC Adapter

Compatibility

Models	Voltage	Amperage	Connector	Compatible AC Adapter(s)	Recommended AC Adapter(s)	Notes/Exceptions
130	16 V, DC	3.36 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter IBM 16V 56W AC Adapter IBM 16V 54W AC Adapter	N/A
220	10.5 V, DC	1 A, DC	5.5 x 2.1 mm, coaxial	IBM 10.5V 11W AC Adapter	IBM 10.5V 11W AC Adapter	N/A
230CS	16.5 V, DC	1.4 A, DC	5.5 x 2.1 mm, semi-hexagon 4-pin	IBM 16.5V 23W AC Adapter	IBM 16.5V 23W AC Adapter	N/A
235, 240, 240X 240Z, i Series 1124	16 V, DC	3.36 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter IBM 16V 56W AC Adapter IBM 16V 54W AC Adapter	N/A
i Series 1200, i Series 1210 i Series 1230, i Series 1250 i Series 1260, i Series 1300 i Series 1330, i Series 1370 i Series 1400, i Series 1410 i Series 1411, i Series 1412 i Series 1420, i Series 1421 i Series 1422, i Series 1441 i Series 1442, i Series 1450 i Series 1451, i Series 1452 i Series 1460, i Series 1472 i Series 1480, i Series 1482 i Series 1483, i Series 1492 i Series 1500, i Series 1512 i Series 1540, i Series 1541 i Series 1542, i Series 1552 i Series 1560, i Series 1562 i Series 1592	16 V, DC	3.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter IBM 16V 56W AC Adapter	N/A
Template:P70, Template:P71 Template:P72, Template:P73 Template:P50, Template:P51 P52, Template:P53	20 V, DC	11.5 A, DC	11.0 x 4.5 mm, rectangle with signal pin	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter Lenovo 20V 45W AC Adapter	Lenovo 20V 230W AC Adapter	High-end configs require 230 W.
W510	20 V, DC	6.75 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter	N/A
W520, W530	20 V, DC	8.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter	N/A
W540, W541	20 V, DC	8.5 A, DC	11.0 x 4.5 mm, rectangle with signal pin	Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter Lenovo 20V 45W AC Adapter	Lenovo 20V 230W AC Adapter Lenovo 20V 170W AC Adapter	N/A
W700, W700ds W701, W701ds	20 V, DC	11.5 A, DC	6.3 x 4.0 mm, coaxial	Lenovo 20V 170W AC Adapter	Lenovo 20V 230W AC Adapter	High-end configs require 230 W.
A20m, A20p, A21e A21m, A21p, A22e A22m, A22p, A30 A30p, A31, A31p i Series 1800	16 V, DC	4.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 56W AC Adapter IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter	N/A
T20, T21, T22 T23, T30, T40 T40p, T41, T41p T42, T42p, T43 T43p	16 V, DC	4.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 56W AC Adapter IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter	N/A
T60, T60p, T61 T61p, T400, T400s T410, T410i, T410s T410si, T420, T420i T420s, T420si, T430 T430i, T430s, T430si T430u, T500, T510 T510i, T520, T520i T530, T530i	20 V, DC	6.75 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter	Intel GPU configs require 65 W. ATI/AMD/NVIDIA GPU configs require 90 W. Quad-core CPU configs require 135 W.
W550s, Template:P50s Template:P51s A275, A475 T431s, T440, T440s T440p, T450, T450s T460, T460s, T460p T470, T470s, T470p T540p, T550, T560 T570, 25	20 V, DC	6.75 A, DC	11.0 x 4.5 mm, rectangle with signal pin	Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter Lenovo 20V 45W AC Adapter	Lenovo 20V 230W AC Adapter Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter	Intel GPU configs require 45 W. AMD/NVIDIA GPU configs require 65 W. Quad-core CPU configs require 135 W.
X20, X21, X22 X23, X24, X30 X31, X32, X40 X41, X41 Tablet, i Series 1620 TransNote	16 V, DC	3.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter IBM 16V 56W AC Adapter	N/A
X60, X60s, X60 Tablet X61, X61s, X61Ls X61 Tablet, X100e, X120e X121e, X130e, X131e X140e, X200, X200s X200 Tablet, X201, X201i X201s, X201si, X201 Tablet X201i Tablet, X220, X220i X220 Tablet, X220i Tablet X230, X230i, X230 Tablet X230i Tablet, X300, X301 X1, X1 Hybrid, Template:Mini 10	20 V, DC	3.25 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	N/A	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter	N/A
L410, L412, L420 L421, L430, L510 L512, L520, L530	20 V, DC	4.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter	Intel GPU configs require 65 W. ATI/AMD/NVIDIA GPU configs require 90 W.
SL300, SL400, SL400c SL410, SL410k, SL500 SL500c, SL510, SL510k	20 V, DC	4.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter	Intel GPU configs require 65 W. ATI/NVIDIA GPU configs require 90 W.
R30, R31, R32 R40, R40e, R50 R50e, R50p, R51 R51e, R52	16 V, DC	4.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 56W AC Adapter IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter	N/A
R60, R60e, R60i R61, R61e, R61i R400, R500	20 V, DC	4.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter	Intel GPU configs require 65 W. ATI/NVIDIA GPU configs require 90 W.
G40, G41	16 V, DC	7.5 A, DC	Singatron 2MJ-3432-007, Mini-DIN-4	N/A	IBM 16V 120W AC Adapter	N/A
G50	20 V, DC	3.25 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	N/A	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter Lenovo 20V 65W AC Adapter	N/A
Edge 11", Edge 13, Edge 14" Edge 15", Edge L330, Edge S430 Edge E120, Edge E125, Edge E130 Edge E135, Edge E145, Edge E220s Edge E320, Edge E325, Edge E330 Edge E335, Edge E420, Edge E420s Edge E425, Edge E430, Edge E430c Edge E435, Edge E520, Edge E525 Edge E530, Edge E530c, Edge E535	20 V, DC	4.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter	Intel GPU configs require 65 W. ATI/AMD/NVIDIA GPU configs require 90 W.
S30, S31	16 V, DC	3.5 A, DC	5.5 x 2.5 mm, coaxial	IBM 16V 54W AC Adapter IBM 16V 35W AC Adapter	IBM 16V 72W AC Adapter IBM 16V 56W AC Adapter	N/A
Z60m, Z60t, Z61e Z61m, Z61p, Z61t	20 V, DC	4.5 A, DC	7.5 x 5.55 mm, coaxial with 0.8 mm signal pin	Lenovo 20V 65W AC Adapter	Lenovo 20V 170W AC Adapter Lenovo 20V 135W AC Adapter Lenovo 20V 90W AC Adapter	Intel GPU configs require 65 W. ATI GPU configs require 90 W.