3V Lithium CMOS RTC Battery for Inspiron Latitude OptiPlex Precision PowerEdge Studio Vostro XPS

Replace a weak RTC/CMOS battery to restore proper BIOS clock retention and saved system settings. A failing CMOS battery commonly causes time/date resets and BIOS prompts after the system is unplugged or loses power.

Technical Specifications

• Type: RTC / CMOS BIOS battery
• Voltage: 3V
• Chemistry: Lithium
• Dimensions: 0.8 in x 0.8 in x 0.1 in (approx.)
• Function: Maintains BIOS time/date and CMOS settings while powered off

Interchangeable / Replacement Part Numbers

• CYMC1, CPA-KU144, 0KU144, KU144, RV2032B, A7187859

✅ Confirmed Compatibility
Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It's essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔️ Alienware: Aurora
✔️ Dimension: 9200, 9200C, C521, E520, E521
✔️ Inspiron: 13 (7347), 1440, 14R (N4010), 15 (7558), 1501, 1525, 1526, 1545, 1546, 1564, 15R (N5010), 15R (N5110), 17 (7737), 1750, 1764, 17R (N7010), 530, 530S, 531, 531S, 6000, 630m, 6400, 640m, E1405, E1505, M501R (M5010)
✔️ Latitude: 131L, 2100, D531
✔️ OptiPlex: 320, 320 Desktop, 320 Mini-tower, 330, 330 Desktop, 330 Mini-tower, 740, 740 Desktop, 740 Mini-tower, 740 MLK, 740E, 745, 745 Desktop, 745C, 745E, 755, 980 DT
✔️ PowerEdge: 1600SC, 1850, 2500, 2600, 2650, 2800, 2850, 2900, 2950, R430
✔️ Precision: R5400, T3400, T3500, T5400, T7400
✔️ Studio: 1458, 1535, 1536, 1537, 1555, 1557, 1558, 1735, 1737
✔️ Vostro: 1000, 1320, 1520, 1720, 200, 400, 410, 500
✔️ XPS: 210, 410, 420, 630I, 720, 730, M140, M1530, M1730, ONE A2010

☑️ Key Features

☑️ Restores BIOS time/date retention and helps prevent clock resets
☑️ Helps preserve BIOS/CMOS settings when the system is unplugged or powered down
☑️ Common fix for repeated BIOS prompts and configuration loss after power is removed
☑️ Interchangeable part numbers included for easier matching

⚙️ Fit Notes

• Match the part number on your original RTC/CMOS battery assembly (examples: 0KU144 / KU144 / CYMC1 / RV2032B) before ordering.
• Confirm the physical style matches your original battery (size, thickness, and mounting style).
• After installation, enter BIOS to set the correct date/time and confirm settings save properly.