Q: What battery replaces 8858X for Dell Latitude E5420, E6420, and Inspiron 15R?
The 8858X (also T54FJ, 911MD) is a 10.8V 48Wh Li-ion 6-cell replacement battery for Dell Latitude E5420, E5430, E5520, E5530, E6420, E6430, E6520, E6530 and Inspiron 14R/15R/17R series laptops. Ships 100% brand new with a 1-year warranty.
Product Specifications
| Attribute | Details |
|---|---|
| Battery Model | 8858X / T54FJ / 911MD |
| Capacity | 48Wh |
| Voltage | 10.8V / 11.1V |
| Battery Type | Li-ion (6-cell) |
| Cell Grade | Grade-A Korean cells |
| Color | Black |
| Condition | 100% Brand New |
| Warranty | 1-Year Warranty |
Replace Part Numbers
- 8858X
- 911MD
- T54FJ
Compatible Laptop Models
- Dell Latitude E5420
- Dell Latitude E5430
- Dell Latitude E5520
- Dell Latitude E5530
- Dell Latitude E6420
- Dell Latitude E6430
- Dell Latitude E6520
- Dell Latitude E6530
- Dell Inspiron 14R-4420 / 5420 / 5425 / 7420
- Dell Inspiron 15R-4520 / 5525
- Dell Inspiron 17R-4720 / 5720
- Dell Vostro 3460 / 3560
Flex-3 Compatibility Note
Q: Is 8858X compatible with Dell Inspiron 7520 or 7720?
8858X is NOT compatible with Inspiron 7520, 7720, or E5520 in 9-cell configuration. N3X1D is also not compatible. Check the battery label on your existing battery before ordering.
Why Choose This Battery
- Grade-A Korean Li-ion cells 48Wh reliable power for Dell Latitude E-series and Inspiron business laptops
- 6-cell design for extended runtime on Latitude and Inspiron workloads
- Built-in BMS: overcharge, over-discharge, short-circuit protection
- Plug-and-play installation no modification needed
- Backed by a 1-year warranty and dedicated after-sales support
