About this replacement
HP iPAQ hx2000 Series — 3.7V Li-ion Replacement Battery (360136-001)
This 3.7V, 1400mAh Li-ion battery replaces the original power cell in the HP iPAQ hx2000, hx2100, hx2110, and hx2115 Pocket PC PDAs. It matches the OEM form factor and connector, fitting directly into the battery bay without modification. Capacity is 1400mAh — matched to the product data, not inflated.
- hx2000 series compatibility: The hx2000, hx2100, hx2110, and hx2115 share the same 3.7V battery rail, connector pinout, and BMS handshake protocol. One cell covers all four variants because HP standardised the battery interface across this mid-2000s Pocket PC lineup.
- Bench tested on actual hardware: We ran this cell on an hx2000 unit and confirmed the BMS accepted the charge cycle without fault flags. Charge draw was steady through CC/CV stages, and the device booted cleanly at full charge.
- Sync before you swap: Perform a full ActiveSync data sync to your host PC before removing the old battery. The hx2000 stores open files, contacts, and application state in volatile SRAM — powered entirely by the main battery. Pull the cell without syncing and that data is gone.
Why the iPAQ hx2000 loses all data on battery removal
The hx2000 uses SRAM for working memory — unlike flash storage, SRAM loses its contents the moment power drops to zero. There is no separate backup coin cell in this model to hold RAM state during a swap. The instant the main battery is disconnected, any data not written to flash or synced to a PC is erased. Always close all apps, sync via ActiveSync, and perform a soft reset before removing the battery.
iPAQ hx2000 not booting after fitting a new battery
A replacement Li-ion cell often ships at a partial state of charge — sometimes below the minimum voltage the hx2000 boot sequence requires. If the device shows nothing on screen or loops at the HP logo after a swap, it has not failed — it needs charge first. Connect the original HP charger and leave the device on charge for at least 30 minutes before pressing the power button. The battery must reach approximately 3.4V before the boot sequence will complete successfully.