About this replacement
Sony Clie PEG-NR60 / NR70 Series — 3.7V Li-Polymer Replacement Battery (LISI241)
This 3.7V 1200mAh lithium-polymer cell replaces the LISI241 battery in the Sony Clie PEG-NR60, NR60V, NR70, and NR70V. It restores power to the PDA's processor, display, and memory subsystem. Dimensions are 60.81 × 37.16 × 5.40mm — measure your original cell before fitting if you are unsure.
- NR60 and NR70 platform compatibility: Both the NR60 and NR70 lines share the same LISI241 cell format, connector pinout, and BMS handshake protocol. One replacement covers the full series without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on NR-series hardware. The BMS accepted the pack cleanly, reported accurate state-of-charge, and held voltage within spec across the full discharge curve.
- Sync before you swap: Perform a full HotSync to your host computer before removing the battery. The Clie NR-series stores open application state and unsaved data in RAM powered directly by the main cell — pulling the battery without syncing first will erase anything not written to Flash storage.
Why the Clie NR60 loses all data after a battery replacement
The NR60 uses SRAM for its working memory, and SRAM requires continuous power to retain data. The moment the old battery is disconnected and before the new one is seated, voltage drops to zero and every byte in RAM is wiped. This is not a fault with the replacement cell — it is a hardware characteristic of the platform. Before swapping, sync all data to a desktop via HotSync and back up any third-party application databases stored in RAM. Restore from the backup immediately after fitting the new battery and completing the first full charge.
Clie NR70 stuck on the Sony logo after fitting a new battery
A new lithium-polymer cell sometimes ships at storage voltage — around 3.5V — which sits below the NR70's minimum boot threshold. The device starts the boot sequence, detects insufficient voltage under load from the display and processor, and stalls. Do not hard reset yet. Connect the original charger and charge for at least 30 minutes before attempting to power on. Once the cell reads 3.7V or above at rest, the boot sequence completes normally.