Laptop Battery for Dell Inspiron 3521 ,4DMNG 15 N3537 15R 3521 TC Notebook 15 3521-2595

MR90Y Laptop Battery for Dell Inspiron 3521 3721 5521 5721 14-3421 14-3437 14R-5421 14R-5437 17 Latitude14 3000 3540 Series XCMRD PN 0MF69 N121Y G35K4 MK1R0 VR7HM

Compatible Part Numbers & Model Numbers

Compatible Part Numbers:

 Dell 0MF69 - Dell 24DRM - Dell 312-1387 - Dell 312-1390 - Dell 312-1392 - Dell 0MF69 - Dell 49VTP - Dell 4DMNG - Dell 4WY7C - Dell 68DTP - Dell 6HY59 - Dell 6K73M - Dell 6KP1N - Dell 6XH00 - Dell 8RT13 - Dell 8TT5W - Dell 9K1VP - Dell DJ9W6 - Dell FW1MN - Dell G019Y - Dell G35K4 - Dell MK1R0 - Dell MR90Y - Dell N121Y - Dell PVJ7J - Dell T1G4M - Dell V1YJ7 - Dell VR7HM - Dell W6XNM - Dell X29KD - Dell XRDW2 - Dell YGMTN - Dell V8VNT

Compatible Dell Inspiron Series Model Numbers: 

Dell Inspiron 14 3421 - Dell Inspiron 14R 5421 - Dell Inspiron 15 3521 - Dell Inspiron 15R 5521 - Dell Inspiron 17 3721 - Dell Inspiron 17R 5721 - Dell Latitude 2421 - Dell Latitude 2521 - Dell Latitude 3440 - Dell Latitude 3540 - Dell Latitude 3721 -Dell Latitude 3737 - Dell Latitude 5437 - Dell Latitude 5537 - Dell Latitude 5737 - Dell Vostro 2421 - Dell Vostro 2521 - Dell Vostro 3445 - Dell Vostro 3446 - Dell Vostro 3546 - Dell Inspiron 15-3251 - Dell Inspiron 3442 - Dell Inspiron 15 3542 - Dell inspiron 15 3543

How do I charge my new battery?

1. For transport safety reasons, new batteries are usually not fully charged. When you receive the battery, please use the remaining energy in the battery until the laptop turns off. Then fully charge the battery and use all the power. Then fully charge it. Repeat the cycle three times to activate the battery.

2. If you store the battery for a long time, the battery requires three to four charge and discharge cycles to achieve maximum efficiency.

3. Sometimes when the battery is charged for the first time, the indicator on the device shows that the battery is fully charged after 10-15 minutes of charging. This is normal for "batteries", just remove the battery from the device, put it back in and charge it.

How to extend the battery life of a laptop?

1. Please charge the battery in time. Many of us like to charge when your laptop's battery is empty, which significantly shortens the battery life. Never discharge your laptop battery under 20% charge if possible.

2. The most important point is to fully discharge and charge the battery every month. The easiest method of discharging is to turn on the device until the battery is empty, and then fully charge it.

3. When you are not using the laptop, you should turn it off. The laptop never turns off, often in standby mode, the battery life of these laptops is often very low.

4. For laptops that often do not turn on, we should also charge the laptop about every half months. If the laptop does not turn on for a long time and does not work, the battery activity also decreases.

5. If you do not use the battery for more than a month, it is recommended to remove the battery from the device and store it in a dry and cool place.

 Install A New Battery:

1. You need to turn off your laptop and disconnect the power.

2. Remove the old battery, carefully install the new battery on the battery case, and connect the wiring of the new battery.

3. If you don't understand the above steps, you can search for the video about laptop battery installation on YouTube. Maybe it will help you.

Laptop Maintenance Tips:

1. New battery: For use a new battery, you’d better try a few cycles of discharging to 5%. then charging up to 95%. So that it can be activated completely

2. Overuse: Do not always run out of a battery to 0%, this would make it damaged or usage life shortened

3. Charging sequence: when charging, first install the battery, then turn on the power, when fully charged, first cut off the power, then pull the power plug.

4. Long-term storage: Please store the unused battery fully charged.(Charge it once a month) Do not store at low power to prevent reduce the lifespan of a battery

5. Charger: Do not replace the laptop adapter casually. If the original adapter cannot be applied due to malfunction or damage, please replace the models, so as not to reduce the service life of the battery due to incompatibility.

PROTECTION DETAILS

• Overload protection
• Over-current protection
• Over-voltage protection
• High voltage protection
• Short circuit protection
• Over-temperature protection
• Easy & Quick Installation