Description
Product Overview
This is a brand new, original replacement Dell KM742 56Wh laptop battery. It ships within one business day from in-stock inventory and comes with free shipping, a 30-day refund policy, and a 1-year warranty.
Specifications
- Battery Type: Li-ion
- Capacity: 56Wh
- Voltage: 11.1V
- Part Number: KM742
Compatibility
This battery is a direct replacement for the following part numbers and laptop models.
Compatible Part Numbers (P/N)
- 312-0762
- 451-10616
- KM668
- KM742
- KM752
- KM769
- MT185
- MT187
- P858D
- PW640
- PW649
- PW651
- RM649
- RM656
- RM661
- RM668
- RM672
- T749D
- U116D
- W071D
- WU841
- WU843
- WU852
- X064D
Compatible Models
- Latitude E5400
- Latitude E5410
- Latitude E5500
- Latitude E5510
Note: The compatibility list is extensive but not exhaustive. If your specific model or part number is not listed, please leave it in the order notes during checkout, and we will confirm compatibility for you.
When Should You Replace Your Laptop Battery?
Consider replacing your battery if you notice any of the following signs. These are common indicators of a battery nearing the end of its usable life.
| Symptom | Description |
|---|---|
| Short Run Time | The battery drains significantly faster than it used to, even after a full charge, providing less than an hour of use under light loads. |
| Swelling or Bulging | The battery pack has visibly expanded or deformed. This is a potential safety hazard, and the battery should be replaced immediately. |
| Failure to Charge | The battery does not charge when connected to the AC adapter, or the charging indicator flashes abnormally. |
| System Inaccuracies | The laptop reports an incorrect charge level (e.g., shutting down suddenly at 30% charge) or fails to recognize the battery. |
| Age | The battery is over 2-3 years old, as all Li-ion batteries degrade over time due to chemical aging. |
Estimated Battery Life
Below are conservative estimates of battery runtime for a Dell laptop with this 56Wh battery under different usage scenarios. Actual results will vary.
| Usage Scenario | Estimated Runtime |
|---|---|
| Web Browsing & Email | 3 – 4 hours |
| Document Editing (Office Apps) | 2.5 – 3.5 hours |
| Video Streaming | 2 – 3 hours |
| Gaming | 1 – 1.5 hours |
| Maximum Battery Saver Mode | Up to 5 hours |
Important Note: A new battery used with older hardware and software will generally not last as long as the original battery did when the laptop was brand new. This is due to natural wear on other components and increased power demands from modern operating systems and applications.
Reviews
There are no reviews yet