The laptop ac adapter can be used to recharge the battery pack in a notebook also to provide trustworthy power for operating the notebook for long periods of time. If an power card for Acer Travelmate does not work out you will not regret recharge the battery pack but it will surely not provide power to operate the laptop without a battery. You can test it first to verify that it is defective. Whether it is time to get a new adapter for the travelmate computer, here is the basics you need to evaluate when choosing a new one: International Power Adapter
Output Features Voltage and milli-Amps(current)
Connector plug size/Output Polarity
Step 1. Decide the required output specs of the AC adapter. To get Travelmate 4000, the outcome current is 3. 42A and output voltage is 19V. This may usually be found on the card, the electronic device, and also the instruction manual of the computer. When selecting an adapter, you will want to match the ac electricity & current as strongly as possible. If an exact match is not available, as the extra volt quality could damage the digital device, it is better to choose a new adapter having the same voltage and higher current than the specifications require. This will work too and supply more power to your laptop.
Step 2. Decide if the assembler should be regulated or unregulated. A regulated AIR CONDITIONING UNIT adapter guarantees that the outcome voltage will always be constant. Consequently, managed AC adapters are also generally more expensive than unregulated ones. It is OK to substitute a regulated adapter for an unregulated one (the disadvantage being added cost), however, Tend not to use an not regulated supply instead of a controlled one!
3. Check the polarity of the Acer TravelMate 4000 ac card. Polarity determines the course that current flows; if the current from the adapter flows the incorrect way for the designed electronic device, the product may be damaged. It is necessary to make certain that the polarity of the adapter and the laptop computer match. NEVER choose an assembler with the wrong polarity as this can affect the equipment.
Step four. Determine the size of the adapter plug. Put sizes are usually measured in millimeters(mm). The plug size of Acer TravelMate 4001 is 1. 7mm times 5. 5mm. In the event the put size is the only thing wrong with an adapter, and therefore its volts and current ratings, whether it is regulated or unregulated, and its polarity all match, it is possible to splice a new plug onto the adapter, as many gadgets stores do sell just the plug in several sizes. However, you must make sure that the new plug maintains the same polarity as the old one, meaning that the wire that linked to the outside surface of the old plug still connects to the outside the house of the new connector, and that the line that linked to the lining surface of the old plug still connects to the lining surface of the new plug.