Sceptre N243 Replacement Battery 14.8V 4400mAh 23-U74201-31

Sceptre N243 / N244 Series — 14.8V Li-ion Replacement Battery (23-U74201-31)

This is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the Sceptre N243 and N244 series notebooks. It replaces OEM part numbers including 23-U74201-31, 23-U74204-00, 23-UB0201-20, and BAT-243S1, among others. It slots into the same bay and uses the same connector as the factory cell.

• N243 and N244 series compatibility: Both models share the same 14.8V four-cell battery architecture and connector pinout. The BMS handshake uses the same communication protocol across the range, so one cell works across all variants listed.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on the N243 platform. The BMS accepted the cell without error flags, balanced all four cells correctly, and the protection circuit tripped at the expected low-voltage threshold.
• First-cycle calibration on the N243: After installing, run a full discharge until the laptop hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that almost always appears after a cell swap on this platform.

BIOS reporting poor battery health immediately after fitting this cell

The N243 BIOS reads health data from EEPROM registers stored on the battery pack's fuel gauge IC. When a new cell goes in, those registers still hold degraded values from the old pack. The system flags poor health before it has taken a single reading from the new cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites those registers against actual cell behaviour. After two to three cycles the health indicator stabilises and reports correctly.

Laptop shutting down at 20–30% charge shown on screen

This is a voltage cliff, not a calibration issue. Under combined CPU and display load, cell voltage drops faster than the fuel gauge IC can update the OS estimate. The BMS sees the real voltage hit the low-voltage cutoff while Windows still shows 20–30% remaining. It is also common after the BIOS learn cycle has not yet completed on a new cell. Run two full discharge-to-hibernate and charge-to-100% cycles, then confirm cell voltage under load does not drop below 11.1V before the OS percentage reaches single digits.