Dell Studio 1735 Replacement Battery 11.1V 4400mAh KM973

Dell Studio 1735 / 1736 / 1737 — 11.1V Li-ion Replacement Battery (KM973)

This 11.1V, 4400mAh (48.84Wh) lithium-ion battery replaces the OEM pack in the Dell Studio 1735, 1736, and 1737 notebooks. It cross-references a large family of Dell part numbers — KM973, KM974, MT335, RM791, PW823, and others — all sharing the same connector, cell configuration, and BMS handshake. Install it when the original pack no longer holds adequate charge for daily use.

• Studio 1735 / 1736 / 1737 platform fit: All three models share the same battery bay dimensions, the same 11.1V three-cell-series configuration, and the same SMBus communication line to the Dell EC. That is why one pack covers the full trio — the BMS reports over the same protocol regardless of which chassis it sits in.
• Bench tested on actual hardware: We cycled this cell on a Studio 1737 and confirmed the EC recognised the pack immediately, the charge controller stepped through pre-charge, constant current, and constant voltage phases without interruption, and the BMS protection circuit tripped correctly on an induced over-discharge test.
• First-cycle BIOS calibration: After installation, run the laptop down until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This forces the Dell battery learn cycle to reset against the new cell's actual capacity and clears the false "poor battery health" warning that appears in BIOS after every cell swap.

Why the Studio 1735 BIOS flags a new battery as poor health

The Dell EC reads health data from EEPROM registers on the battery's BMS — not from live voltage measurements. When you swap cells, the EEPROM data from the old, degraded pack is no longer relevant, but the EC has not yet run enough charge cycles to write new reference values. Until it does, BIOS reports the health status carried over from the previous calibration baseline. Running one complete discharge-to-hibernate followed by a full uninterrupted charge gives the EC enough data to overwrite those stale EEPROM values and report accurate health.

Laptop shuts down at 20–30% charge shown after battery swap

This is a voltage-cliff failure, not a calibration issue. Under full CPU and display load, the new cell's voltage drops faster than the fuel gauge IC expects based on its stored discharge curve from the old battery. The EC sees terminal voltage fall below the shutdown threshold while the gauge still reads 20–30%. The fix is a full calibration cycle: discharge to hibernate-cutoff under normal use, then charge to 100% without interruption. After two to three cycles, the fuel gauge IC maps the new cell's actual discharge curve and the early shutdowns stop.