{"product_id":"ibm-c3-replacement-battery-37v-500mah-li-polymer","title":"IBM C3 Pocket PC Replacement Battery 3.7V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIBM C3 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 500mAh lithium-polymer cell replaces the original battery in the IBM C3 pocket PC. The C3 is a PDA-class handheld used for scheduling, contacts, and notes. When the original cell degrades, this replacement restores normal operation without sourcing new hardware.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIBM C3 compatibility:\u003c\/strong\u003e\n    The C3 uses a single-cell Li-Polymer pack at 3.7V nominal. The connector pinout and physical footprint — 49.65 × 22.35 × 5.43mm — match the original cell directly. The onboard BMS handles charge termination at 4.2V and low-voltage cutoff near 3.0V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the C3 platform. The BMS accepted charge from the cradle without fault flags, and the device held full operating state through the complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePre-swap data sync:\u003c\/strong\u003e\n    The C3 stores open files and application state in RAM powered directly by the main battery. Before removing the old cell, perform a full sync to the host computer. Any unsaved data in RAM is lost the moment battery voltage drops to zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the IBM C3 won't boot after a fresh battery is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage charge — typically 3.6V to 3.7V, not full charge. The C3 boot sequence draws a short current spike that can trip the BMS low-voltage protection if the cell is near its lower threshold. The device may appear dead even with a new battery installed. Place it in the charging cradle for at least 30 minutes before attempting to power on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eIBM C3 showing full charge but losing power faster than expected\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C3 radio and backlight pull significantly more current than standby mode — far beyond what the capacity gauge accounts for in idle estimates. If wireless sync is active during heavy use, voltage sag under load can cause the device to read a false \"full\" state. Disable wireless sync when not actively transferring data. Check the charge indicator only after the device has been at rest for several minutes to get an accurate voltage reading.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415955308634,"sku":"BWCS-PMVXSL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415955341402,"sku":"BWCS-PMVXSL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415955374170,"sku":"BWCS-PMVXSL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PMVXSL-1.webp?v=1779758481","url":"https:\/\/batteryweb.com\/products\/ibm-c3-replacement-battery-37v-500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}