{"product_id":"sony-clie-peg-t400-replacement-battery-37v-850mah-li-polymer","title":"Sony Clie PEG-T400 Replacement Battery UP523048 3.7V 850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony Clie PEG-T400 Series — 3.7V Li-Polymer Replacement Battery (UP523048)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 850mAh Li-Polymer cell replaces the original battery in the Sony Clie PEG-T400, PEG-T410, PEG-T425, and PEG-T600, along with thirteen additional Clie models. It restores power to the device for contacts, calendar, tasks, and document management. Capacity figure is 850mAh \/ 3.15Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClie T-series compatibility:\u003c\/strong\u003e\n    The PEG-T400, T410, T425, and T600 share the same UP523048 cell footprint, connector pinout, and BMS handshake protocol. One battery covers all four core models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a PEG-T400 and confirmed the BMS accepted the charge cycle without triggering overcurrent cutoff. The device booted normally and Palm OS loaded without prompting a hard reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRAM data protection before swap:\u003c\/strong\u003e\n    Perform a full HotSync to your host computer before removing the old battery. The Clie stores open application state and unsaved data in volatile SRAM powered directly by the main cell. Cutting power without syncing first will erase that data permanently.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Clie PEG-T400 loses all data after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe PEG-T400 uses SRAM for active storage, not flash. SRAM is volatile — it requires continuous voltage to retain data. When the old battery is removed and the new one is not yet installed, that voltage drops to zero and the RAM contents are wiped. This is not a fault with the replacement cell; it is a hardware limitation of early 2000s PDA architecture. To avoid data loss, complete a HotSync immediately before the swap so everything is preserved on the host machine.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eClie PEG-T400 stuck on boot screen after new battery installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly shipped Li-Polymer cell often arrives at a storage charge of around 3.0–3.2V. The PEG-T400 boot sequence requires a minimum voltage threshold to initialise Palm OS; below that, the device stalls on the startup screen or loops. Do not attempt repeated resets — they drain the cell further. Connect to the OEM charger and allow at least 30 minutes of charge before attempting to power on. Once the cell reaches approximately 3.5V, the boot sequence completes normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415945412698,"sku":"BWCS-T400SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415945445466,"sku":"BWCS-T400SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415945478234,"sku":"BWCS-T400SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-T400SL-1.webp?v=1779758397","url":"https:\/\/batteryweb.com\/products\/sony-clie-peg-t400-replacement-battery-37v-850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}