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Apple® Laptop Chargers

Each laptop computer requires a unique voltage, current and connector. Your first step in finding the correct Apple® laptop charger is to select your model or adapter part number below; or by using the Charger Select Technology� search tool.
Laptop Charger Articles & Tips For Apple®

Upgrade my Laptop Charger from NiMH to Li-Ion

NiCD, NiMH and Li-Ion laptop chargers are all fundamentally different from one another and cannot be substituted unless the laptop has been pre-configured from the manufacturer to accept more than one type of charger chemistry. Please refer to your manual to find out which rechargeable charger types the laptop device supports or use our Charger Finder above to find all the compatible laptop chargers for your Apple® device. It will automatically list all of the charger chemistries supported by your specific device. If your device does allow you to upgrade the charger from NiMH to Li-Ion, you will typically get longer run times.

For example, if your laptop uses a NI-MH charger that is 9.6 Volts, 4000mAh and the new li-ion laptop charger is 14.4 Volt, 3600mAh, then you will obtain longer run time with the li-ion charger.


Li-Ion: 14.4 Volts x 3.6 Amperes = 51.84 Watt Hours
Ni-MH: 9.6 Volts x 4 Amperes = 38.4 Watt Hours
The Li-Ion is stronger and has longer run time.

Click here for information on calculating laptop charger run time.

How can I maximize the performance of my Laptop Charger for my Apple® Laptop?

There are several steps you can take to help you get maximum performance from your laptop charger:

Prevent Memory Effect - Keep the laptop charger healthy by fully charging and then fully discharging it at least once every two to three weeks. Exceptions to the rule are Li-Ion chargers which do not suffer from memory effect.

Keep the laptop charger clean - It's a good idea to clean dirty charger contacts with a cotton swab and alcohol. This helps maintain a good connection between the charger and the device. Check for any corrosion on the contacts.

Exercise the Charger - Do not leave the charger dormant for long periods of time. We recommend using the charger at least once every two to three weeks. If a laptop charger has not been used for a long period of time, fully charge and discharge the charger before using.

Charger Storage - If you don't plan on using the laptop charger for a month or more, fully charge the charger and then store it in a clean, dry, cool place away from heat and metal objects. NiCad, NiMH and Li-Ion chargers will self-discharge during storage; remember to recharge the chargers before use.

What is the run time of a laptop charger?

Laptop chargers have three main ratings on them: Volts (V), Ampere-hour (Ah), and watt-hours (Wh or Whr). Because size and weight of laptop chargers is limited when compared to larger chargers such as car chargers, most companies show their ratings mainly as Milliampere-hour (mAh). One thousand Milliampere-hours equal 1 Ampere-hour. The more Milliampere-hour a charger is rated, the longer the laptop will run between recharges. Chargers are also rated by Watt-hours, which is simply found by multiplying the Volts and the Ampere-hours together. For example:

14.4 Volts, 4000mAh (Note: 4000mAh is equal to 4.0 Amperes).

14.4 x 4.0 = 57.60 Watt-Hours

Watt-Hours signifies the energy needed to power one watt for one hour. Thus this laptop charger can power 57.60 watts for one hour. If your laptop runs at 20.50 watts, as an example, this laptop charger could power your laptop for 2.8 hours (2 hours and 48 minutes).

Understanding your charger needs for your Apple® Laptop

We strive to make your laptop charger purchases easy. Since we understand that finding the right chargers for your needs can be overwhelming and confusing at times, we have developed a laptop charger finder tool to help you find the right charger for your laptop. We also offer educational articles and tips and a FAQ section to answer your questions and help you understand the most common problems.
Apple®, iBook®, iPad®, MacBook® and PowerBook® are registered trademarks of Apple Inc. in the United States and other countries. Newton™ is a trademark of Apple Inc.


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