Cheap 42t4430 20V,90W laptop ac adapters

1. replacement adapter for lenovo 42t4430, 20V, 4.500A, 90W, laptop ac adapters

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	Product ID: 1061026 Input: AC 100~240V 50~60Hz Output Voltage: 20V Output Current: DC 4.5A Power: 90W Connector: 7.9mm*5.5mm Property: replacement [?] Replace brand: lenovo Warranty: 18 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1001317 Battery Type: Li-ion Property: replacement [?] Voltage: 10.8 V Battery capacity: 6600 mAh Color: black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1002229 Battery Type: Li-ion Property: original [?] Voltage: 11.1 V Battery capacity: 8400 mAh Color: black Warranty: 9 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1002013 Battery Type: Li-ion Property: original [?] Voltage: 10.8 V Battery capacity: 5200 mAh Color: Black Warranty: 9 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1002593 Battery Type: Li-ion Property: original [?] Voltage: 14.4 V Battery capacity: 2200 mAh Color: Black Warranty: 9 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1001769 Battery Type: Li-ion Property: replacement [?] Voltage: 10.8 V Battery capacity: 6600 mAh Color: Black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1001616 Battery Type: Li-ion Property: replacement [?] Voltage: 14.4 V Battery capacity: 4000 mAh Color: black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1001318 Battery Type: Li-ion Property: replacement [?] Voltage: 10.8 V Battery capacity: 4400 mAh Color: black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1002594 Battery Type: Li-ion Property: replacement [?] Voltage: 11.1 V Battery capacity: 4400 mAh Color: Black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1001733 Battery Type: Li-ion Property: replacement [?] Voltage: 14.4 V Battery capacity: 2200 mAh Color: Black Warranty: 12 months

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Relevant lenovo Laptop Batteries

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	Product ID: 1002303 Battery Type: Li-ion Property: original [?] Voltage: 11.1 V Battery capacity: 5200 mAh Color: Black Warranty: 9 months

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Lenovo 42t4430 laptop ac adapters can replace the following part number:

42t4430 laptop ac adapters is compatible with the following models :

How to check the lenovo 42t4430 adapter problem

  1, Make sure the 42t4430 AC adapter is firmly and securely plugged into the wall outlet. Check adapter indicator light. Many laptop AC adapters have a power indicator light on the adapter brick. Check for this indicator light and if there is one, make sure it is light up with a green light. If you see a power indicator it is a good indication that the adapter is at least receiving power.

  2, The metal tip on the lenovo 42t4430 adapter cord needs to be firmly attached to the laptop for the laptop to receive power from the adapter. Also, in either the metal tip on the adapter or the connection on the laptop, there is often a small metal pin. Make sure this pin is not bent or broken as that can cause a problem with the laptop receiving power from the adapter.

  3, Use a multimeter. Plug in the AC adapter. Then touch one probe to the negative part of the plug (usually the outer casing) and the other to the positive contact (typically a pin inside the plugs outer casing). Your looking for a match on the voltage and amperage listed under “output” on the sticker on the adapter. You don't need to worry about touching the positive probe to the negative contact and vise versa, it will not hurt it and you'll get the same reading either way.

If you see voltage or amperage that jumps around from high to low a lot, Ditch that adapter immediately, it can seriously damage anything it's plugged into.

If the voltageis off by just a bit that's ok, same goes for amperage. But if it's more than 1 volt or 1 amp off be concerned.

Note: a laptop should always be matched to an adapter that provides the exact voltage the sticker on the bottom of the laptop calls for. Again, 1 volt or less off is OK but not ideal. Anything under or over can damage the laptop. But amperage can go over and more than what is called for can be desirable as it will charge the laptop battery faster.

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