{"product_id":"toshiba-chromebook-cb30-100-replacement-battery-148v-3300mah-li-polymer","title":"Toshiba Chromebook CB30-100 Replacement Battery PA5171U-1BRS 14.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eToshiba Chromebook CB30-100 Series — 14.8V Li-Polymer Replacement Battery (PA5171U-1BRS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 3300mAh (48.84Wh) Li-Polymer battery for the Toshiba Chromebook CB30-100, CB30-102, and CB30-A3120 series. It replaces OEM part PA5171U-1BRS directly. If your CB30 no longer holds a charge or fails to power on away from the wall, this cell restores full portable operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCB30-100 \/ CB30-102 \/ CB30-A3120 compatibility:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, 14.8V voltage rail, and PA5171U-1BRS connector pinout. The BMS handshake protocol is identical across the series, so one cell covers all three variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the CB30 platform. The BMS communicated correctly with the Chromebook's charge controller, and the fuel gauge IC tracked state-of-charge without dropout throughout the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset procedure for CB30:\u003c\/strong\u003e\n    After fitting the new cell, let the Chromebook discharge fully until it hibernates, then charge uninterrupted to 100% without powering the device on mid-charge. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the false health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new CB30 cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe CB30's BIOS reads health data from EEPROM registers written by the original cell during its service life. A new cell ships with factory EEPROM values that do not match what the BIOS expects, triggering a false \"poor health\" or \"replace battery\" flag right after installation. This is not a fault with the replacement cell — it is a calibration mismatch. Running one full discharge-to-hibernate cycle followed by a continuous charge to 100% rewrites the learn cycle data and clears the warning. After two to three full cycles, BIOS-reported health will stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCB30 shutting down at 20–30% charge shown on the OS gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the aged original cell can no longer sustain voltage under combined CPU and display load — the actual cell voltage drops below the BMS cutoff threshold before the fuel gauge reaches 0%. The OS gauge is reading a stale capacity map, not real-time cell voltage. Fitting a new cell eliminates the voltage cliff, but the fuel gauge IC still needs calibration cycles to map the new cell accurately. Run two full discharge-to-hibernate and recharge cycles; the gauge should track to within a few percent of actual remaining capacity by the third cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409650942042,"sku":"BWCS-TOC310NB-1","price":102.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409650974810,"sku":"BWCS-TOC310NB-2","price":118.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409651007578,"sku":"BWCS-TOC310NB-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOC310NB-1.webp?v=1779580312","url":"https:\/\/batteryweb.com\/products\/toshiba-chromebook-cb30-100-replacement-battery-148v-3300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}