Dell Latitude XT3 Replacement Battery 11.1V 3600mAh 1H52F

Dell Latitude XT3 — 11.1V Li-ion Replacement Battery (1H52F)

This 11.1V, 3600mAh Li-ion battery replaces the original cell in the Dell Latitude XT3 convertible tablet-laptop. It fits the XT3's battery bay directly and covers all major OEM part numbers including 1NP0F, 37HGH, 9G8JN, H6T9R, KJ321, and RV8MP. Capacity is 3600mAh (39.96Wh) — matched to the original specification.

• Latitude XT3 compatibility: Dell's XT3 uses a shared battery platform across its convertible SKUs. All OEM part numbers listed above draw from the same 11.1V three-cell architecture and use the same connector and BMS handshake — so one cell covers the full XT3 production run.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the XT3 platform. The BMS negotiated correctly with Dell's EC firmware, charge current ramped as expected, and the cell reached full capacity without triggering a fault flag.
• Post-install calibration on the XT3: After fitting this battery, run the laptop down to hibernate cutoff under normal load, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell's EC firmware.

BIOS reporting battery health as poor after fitting a new cell on the XT3

Dell's EC firmware reads health data from the battery's EEPROM. When a new cell arrives, that EEPROM contains factory-default values that don't match any learned charge history — so the BIOS flags it as degraded. This is a firmware interpretation issue, not a fault with the cell itself. Run one full discharge-to-hibernate then a full uninterrupted charge and the BIOS learn cycle will rewrite those values against the new cell's actual behaviour.

XT3 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC hasn't yet calibrated against the new cell's voltage curve. The OS reads an inaccurate state-of-charge and the laptop shuts down as the cell hits its actual low-voltage cutoff — while the gauge still shows charge remaining. Under combined CPU and display load, the XT3 draws enough current to accelerate the voltage drop toward that cliff. Two to three full discharge-and-charge cycles recalibrate the fuel gauge IC; after that, the shutdown percentage should track accurately down to the configured cutoff, typically around 5%.