Beisite 3DDDG laptop battery 11.4V 42Wh for Latitude 5280 5480 5580 5290 5490 5580 5590S

Compatible Dell Latitude Battery

This 11.4V 42Wh lithium-ion battery replaces part numbers 3DDDG and 03VC9Y for Latitude 5280, 5480, 5580, 5290, 5490 and 5590 series laptops. It restores mobile power for users whose original pack no longer holds a charge. The black casing matches the factory appearance. Buyers who need a different voltage or a higher capacity pack should look elsewhere.

Straightforward Installation

The battery fits into the standard internal bay using the existing latch mechanism; no tools beyond a small Phillips screwdriver are typically required. Align the connector carefully before pressing it home to avoid bent pins. A common mistake is forgetting to disable the internal battery in BIOS before removal, which can cause a short circuit. First-time installers should watch a model-specific guide to locate the release screws.

Practical Capacity Limits

At 42Wh the pack delivers a modest runtime increase over a degraded original but cannot match extended-capacity options that some chassis accept. The 11.4V nominal voltage is fixed by the laptop’s charging circuit, so swapping to a higher-voltage cell is not possible. Heavy workloads will drain the charge faster than light office use, and the 12-month warranty covers defects only.