DR02P R73TC Laptop Battery Replacement for Dell Latitude 5540 5440 Precision 3580 3590 3480 3490 Series DR02P 803W6 0803W6 2X1V9 02X1V9 54Wh 11.4V 4623mAh

If the new battery is not recognized during the initial installation, please reinstall and check if the interface is fully connected.
For The first time to use the new battery,discharge the new battery to 10% (Do not 0%), then charge it to 100%. Cycle 3-5 times to activate its maximum capacity.
Do not run out of battery power to 0%, the lithium battery will turn on the Charge Protection. So it can not be recharged any more.
If the battery needs to remain idle in a month or a longer time, remove the battery out of the computer, charge it to 60%-80% and store it in a dry cool and clean place.
We strongly recommend you to check and confirm your laptop model, original battery model and appearance before placing your order, compare it with our battery images to make sure it is the one you need

We guarant-ee 30 days return/exchange policy and 12-month warrant-y; 24 x 7 email support. If you have any questions, please contact-us at your convenience and we will do our best to solve your problem!
Under normal use, most batteries last about 3 hours. Some high-capacity batteries can last up to 5-8 hours.
Battery life depends on the laptop's CPU processor speed, applications, screen brightness, external ports for wireless devices, and the life of the battery itself, so the actual battery life may differ from your original model. If you find that your new battery only lasts a short time or drops out quickly, please consult us and we will help you until the problem is solved.
Please look at the physical characteristics of the battery correctly. Battery itself is a consumable product, it will be affected by the number of times the battery is used, the user's habits, the temperature of the environment and other factors and gradually shorten its own use time.
Typically, you receive a new battery with approximately 50% charge to keep the battery active. During long-distance transportation and storage in warehouses, the battery may be naturally depleted. Please fully charge the battery before use, then discharge it to 10%-20% and cycle it 3-4 times.
Vmaxxfanee after-sales service How long does the battery last when fully charged? Tips How to charge and discharge a new battery ?