How can I extend laptop battery life through settings?

Use Battery Saver or Power Saver mode to minimize background activity and reduce screen brightness. Choose energy-efficient power plans instead of 'Balanced' or 'High Performance'.

Does reducing screen brightness really help my battery last longer?

Yes. The display is one of the largest power drains. Lowering brightness can significantly conserve battery life.

Will closing unused apps and tabs improve battery life?

Yes. Idle apps and browser tabs continue consuming power. Closing them reduces background activity and extends runtime.

Is keeping my laptop cool important for battery longevity?

Absolutely. Heat accelerates battery wear. Use your laptop on hard surfaces, keep vents clean, and consider a cooling pad during heavy use.

What’s the ideal battery charge range for long-term health?

Keep the battery between 20% and 80% whenever possible. Avoid full discharges or keeping it at 100% constantly.

Are regular OS and driver updates important?

Yes. Updates often include power efficiency improvements, helping your system run more smoothly and save battery.

Should I unplug unused peripherals to save power?

Yes. Devices like external drives, USB accessories, and Bluetooth peripherals draw power even when idle. Disconnect them when not needed.

Is shutting down better than sleep for battery conservation?

Yes. Sleep still draws some power. Shutting down completely conserves the most battery during long idle periods.

Can hibernation extend battery life effectively?

Yes. Hibernation saves your session to disk and powers off completely, using no battery while preserving your work.

What quick tips help in a battery pinch?

Turn off Wi-Fi and Bluetooth when not in use, close background apps, use dark mode, and enable power-saving display settings.

How do I find the correct laptop battery for my device?

Check your laptop’s owner’s manual or the label on the bottom of your device for the brand and exact model number. Then verify the part number printed on your original battery to ensure compatibility.

Where is the battery part number located?

Shut down your laptop, remove the battery, and read the label printed directly on the battery. That part number is the most reliable way to confirm compatibility.

Are different battery voltages interchangeable?

No. A battery rated 11.1V is not compatible with one rated 14.8V. Always match the voltage on your original battery. Note: 10.8V equals 11.1V, and 14.4V equals 14.8V.

What should I compare before ordering a replacement battery?

Compare the size, connector type, latch position, and orientation of your original battery with the product photos and specifications on DrBattery.com.

Can I use device model numbers instead of part numbers?

You can, but battery part numbers are more precise. A single device model can support multiple battery types, so confirming with the battery’s printed part number is best.

(Adapter Bundling Available) KM742 Battery for Dell Latitude E5400 E5410 E5500 E5510 Series KM769 WU841 KM771 KM752 KM760 KM970 MT186 MT332 PW649 RM661 312-0746 312-0762 451-10616 WU843 Y568H [11.1V] Compatible Battery

(Bundle with Adapter for 50% Off) Dell KM742 Latitude E5400 E5410 E5500 E5510 Series KM769 WU841 KM771 KM752 KM760 KM970 MT186 MT332 PW649 RM661 312-0746 312-0762 451-10616 WU843 Y568H [11.1V] Compatible Battery

$40.95 USD

~~$97.50 USD~~ Sale $40.95 USD

*Price shown is for the Battery only. The AC adapter is offered at a discount when clicking the 'Add to Cart' button.*

Capacity 4400mAh / 49Wh 6600mAh / 73Wh

Product variants

Product Info

Type Bundle
SKU LDE221-db-u001
Cell Type Conventional Li-ion
Warranty 1 Year
Shipping Free Shipping

Description
Specification

Bundle Product – Save More Together!

Buy this battery and get 50% off a compatible laptop adapter when purchased together!!!

After clicking the "Add to Cart" button, a pop-up box will appear, allowing you to add the adapter to your cart with the discount applied automatically.

Don’t miss this deal—bundle and save today!
***Note***
- Bundle discount are exclusive and cannot be combined with bulk discounts on orders.
COMPATIBLE LAPTOP MODELS

Dell Latitude Series:

E5400 | E5400N | E5410 | E5500 | E5500 N-Series | E5510

COMPATIBLE ORIGINAL BATTERY NUMBERS

Dell:

312-0746 | 312-0762 | 312-0769 | 312-0902 | 451-10616 | A2990667 | KM668 | KM742 | KM752 | KM760 | KM769 | KM771 | KM970 | MT186 | MT187 | MT193 | MT196 | MT332 | P858D | PP32 | PP32LA | PP32LB | PW249 | PW640 | PW649 | PW651 | RM649 | RM656 | RM661 | RM668 | RM680 | T749D | U116D | U725H | W071D | W701D | WU841 | WU843 | WU852 | X064D | X644H | Y568H

REMARKS
- Please confirm your laptop model and battery number before placing an order.
Product Type: Replacement Laptop Battery

Condition: New

Cell Type: Conventional Li-ion

Capacity: 4400mAh / 49Wh or 6600mAh / 73Wh

Device Voltage: 11.1V

Product Type:	Replacement Laptop Battery
Condition:	New
Cell Type:	Conventional Li-ion
Capacity:	4400mAh / 49Wh or 6600mAh / 73Wh
Device Voltage:	11.1V

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$81.90 USD

~~$128.70 USD~~ $81.90 USD

Combine Any 5+ Laptop Batteries or Adapters for 10% Off, 10+ for 20% Off!

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(Bundle with Adapter for 50% Off) Dell KM742 Latitude E5400 E5410 E5500 E5510 Series KM769 WU841 KM771 KM752 KM760 KM970 MT186 MT332 PW649 RM661 312-0746 312-0762 451-10616 WU843 Y568H [11.1V] Compatible Battery

Product Info

Bundle Product – Save More Together!

Buy this battery and get 50% off a compatible laptop adapter when purchased together!!!

COMPATIBLE LAPTOP MODELS

COMPATIBLE ORIGINAL BATTERY NUMBERS

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Dr.Bulbs 6-Pack BR30 9W (65W Equivalent) 4000K Cool White Dimmable LED Bulbs

150W USB Type C Charger AC Adapter Power Cord with 4 Ports GaN Desktop Charger USB C Charging Station for MacBook Pro Air M1 M2 model Dell XPS HP Lenovo Asus Acer Steam Deck All Computer and Smart Phone