8 cells 4400mAh Acer TravelMate 4021NWLMI excellent quality battery uses an intelligent control chip, which comes with higher performance and reliability, longer run-time and battery life. Built-in protection circuitry ensures its stability and safety, fast charge but slow power consumption.
Strong endurance , power saver, use good cells to do laptop battery - Acer TravelMate 4021NWLMI Excellent quality Battery Replacement.
Features of Our Acer TravelMate 4021NWLMI replacement battery:
Each Acer TravelMate 4021NWLMI replacement battery unit is made of high-quality lithium-ion cells for longer last time.
The battery is up to standard and fully compatible with original specifications.
All our batteries are certified by CE, UL, ROHS, ISO9001/9002 as safe products.
The interface metal and fixed insulator of the battery are made of good materials to ensure stable current input and durability.
We specialize in providing high-quality batteries. The Acer TravelMate 4021NWLMI Battery has passed tests according to Security Standards to ensure battery's quality. The interface metal and solid insulators of theAcer TravelMate 4021NWLMI battery are made of Premium materials to ensure stable current input and durability. Round-sealed package ,faster delivery and thoughtful after-sales service will make you feel assured to purchase.
Security Technology
Multiple Protection Features, Safe and Worry-Free.
ESD PROTECTION
overheating protection
short circuit protection
CHARGING TIME PROTECTION
over discharge protection
INTELLIGENT PROTECTION
CLASS A PROTECTION
overvoltage protection
overcurrent protection
overcharge protection
ELECTROMAGNETIC
POWER PROTECTION
Product Larger Images
Compatibility
Note:
Please confirm your laptop battery and laptop model and check the appearance of the battery before placing an order. If you are not sure about your battery part number, you can contact our online customer service in time to avoid delays in your use. Regardless of any problems you encounter during the purchase process, please contact us in time and we will be happy to help you with your problem.
Compatible Battery Part Number
4UR18650F-1-QC192
916C4820F
BT.00403.009
BT.00407.001
BT.00605.012
BT.T5005.001
CGR-B/8B5AE
SQU-401
SQU-525
SY6
Compatible Laptop Models
TravelMate 4021NWLMI
Aspire 1414LM
Aspire 3002NLCI
Aspire 3508WLMI
Aspire 3510
Aspire 5001LM
Extensa 2303LM
TravelMate 2303LC
TravelMate 2303NLCI
TravelMate 4002LMI
TravelMate 4022NWLMI
Shipping Methods
Payment Methods
Warranty
shipping within 24 hours
After your payment is successful, we will arrange delivery within 24 hours.
30-Day Money Back Guarantee
We promise, the new Acer TravelMate 4021NWLMI battery
Can be used free for 30 days, not satisfied with direct return.
1-Year Warranty
We offer a 12-month warranty to replace the Acer TravelMate 4021NWLMI laptop battery! In the meantime, if your battery fails due to quality problems, we will replace it with a new one for free.
100% Security Payment
We focus on the protection of personal privacy information, and we have taken all steps to ensure that your shopping experience is safe and secure, buy Acer TravelMate 4021NWLMI replacement battery with confidence!
FAQs
Q: The Acer TravelMate 4021NWLMI battery has been installed several times, but laptop can't boot up?
A: Carefully check if interfaces of the computer and the battery are correctly connected.
If the cause of loose contact is ruled out, please contact the after-sales customer service to ensure that the battery part number and laptop model are matched.
Q: How to store the Acer TravelMate 4021NWLMI battery if you won’t use it for a long time?
1It is not a feasible way for you either fully charge or fully discharge battery if long term storage. Security risks will generate if under a fully charged state, while both cells and control circuit protection lock will be deactivated if under a fully discharged state. So you’d be better store the Acer TravelMate 4021NWLMI battery at a half fully charged state and keep it in a cool, dry place. 20 degrees Celsius is the optimum storage temperature.
2Install and run Acer TravelMate 4021NWLMI battery as often as possible(at least once a month) so as to ensure its availability and avoid power drain.
Q: How to extend the life of your Acer TravelMate 4021NWLMI battery?
1Please fully charge your laptop before using it for the first time. Because the Acer TravelMate 4021NWLMI battery is normally shipped in a partially-charged state. Please cycle your battery pack by fully charge (more than 12hours) and discharge(less than 10%) for 3-5times to reach maximum rated capacity.
2Please don’t discharge battery to 0%, which is the most common reason among faulty batteries. It will damage battery if the laptop usually works at a critical power level ( below 3%).
3Charge the battery before it runs to 20%. It is scientifically justified that charging battery at 20% till 80% will extend battery life to the longest.
4If your Acer TravelMate 4021NWLMI battery won’t be used for a long time, please charge it once a month and keep battery power over 50%, remove it from your laptop and store it in an antistatic bag in a cool, dry place.
