Note :1. 7.7V and 7.8V are compatible, they are in common use. 2. Before placing an order please ensure your old battery is same to type C.
Better quality, Better price
High Quality Replacement Battery for Asus S509DA-EJ755T Laptop, Feel Free To Use!
Asus S509DA-EJ755T battery is a fast-charged, high-quality, high-capacity, superior-performing Asus laptop
battery. The replacement battery for Asus S509DA-EJ755T notebook is manufactured in strict accordance with the original circuit design and standard. Selection
of ABS fireproof plastic shell, the original protection IC chip, branded lithium-ion batteries and adoption of a multiple
intelligent security protection are in order to meet and exceed the original equipment manufacturers specifications.
Our requirements for safety performance are extremely strict. Each replacement battery for Asus S509DA-EJ755T has gone through more
than one hundred strict tests on the quality and safety. These replacement batteries for Asus S509DA-EJ755T have passed the CE, UL, ROHS, ISO9001/ISO9002 and other
international related certifications. Our products have been sold in many countries and regions around the world because
of their powerful performance, high security and acceptable price.
More importantly, our Asus S509DA-EJ755T notebook batteries are sold directly on the network, without other agents profits included. Therefore, the
price that you see on our website will generally be 20-50% lower than our competitors. If you find a cheaper product on the
competitive website, please let us know that and we will solve this problem for you.
Please visit our Shipping page for more shipping information.
Please visit our Payment page for more payment information.
We offer 12 months warranty on the replacement battery for Asus S509DA-EJ755T laptop! During this period, if your battery fails due to quality problems, we will replace your battery with a new one.
30-Day Money Back Guarantee
The new Asus S509DA-EJ755T battery should be charged fully and discharged to lower 5-10% for 5-6 times for normally perform. Traditional
7-Day Money Back Guarantee cannot meet test needs enough. To this end, we extend the warranty from 7-day to 30 days.
Please note: in order to qualify to get your money back, you must first contact us and await instructions before sending back your product.
If there are any problems with the battery you purchased from us, please contact us first. We will process your request as soon as possible and solve your problems. If our technical engineers cannot solve your problems, we will generate an RMA number for you, so that you can return the battery to us. If the testing result indicates that the returned battery is faulty, we will refund you or send you a new battery for free.
Please note: we cannot process returned batteries if you have not yet received an RMA number.
Q: How do I check if this battery is compatible with my laptop?
First, you need to find model name of your laptop or part number of the old battery(e.g. "S509DA-EJ755T"), and then check whether they
are in the "Compatible Laptop Models" table or "Compatible Battery Part Numbers" table. Second, you need to check that the voltage (rated) of
this battery is the same as your old battery. Finally, please compare the image in the "Product Larger Images" with your old battery to make
sure you can choose the right battery.
We have been focused on providing high-quality batteries for various branded notebooks. Our website contains more than 100,000 laptop
batteries, including almost all the notebook batteries on the market. In addition, for more accurately searching for the battery, you
can click How to find one correct battery for my laptop? for
more details. If you can not find the battery you want, you can contact customer service for help.
Q: Should the new battery for Asus S509DA-EJ755T be repeatedly charged fully and discharged to below 10% three times to be totally activated?
A: No. Now the battery batteries have been activated before shipment, and the battery batteries should be activated when they are sealed into
battery packs. So the notebook battery that you receive has been already done.
Q: Need you charge Asus S509DA-EJ755T battery for 12 hours in the first use?
A: No. Our batteries are lithium-ion batteries without memory effects. When the laptop battery is fully charged, the charging current will be cut off automatically. Charging for 12 hours is wasting time.
Q: How should I use and maintain the battery for Asus S509DA-EJ755T notebook properly?
1Avoid discharge to below 5%. 2Charging the battery when using the notebook, or continuing to use the external power supply after the completion of charge will not cause additional damage to the battery. 3When the Asus S509DA-EJ755T battery is not used for a long time, the battery should be charged and placed in a cool dry place. Since then, the battery should be charged once a month to prevent the battery from being damaged due to excessive discharge. 4Can not be placed in the low temperature, avoid water vapor erosion, and being placed in the high-temperature car. 5Make your laptop into sleep or hibernate when the notebook is not in use. 6Unplug the USB device that is not used on the notebook.