{"product_id":"toshiba-dynabook-portege-a30-replacement-battery-154v-2700mah-li-polymer","title":"Toshiba Dynabook Portege A30 PA5331U-1BRS Replacement Battery 15.4V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eToshiba Dynabook Portege A30 Series — 15.4V Li-Polymer Replacement Battery (PA5331U-1BRS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 2700mAh (41.58Wh) lithium-polymer replacement battery for the Toshiba Dynabook Portege A30 series ultraportable notebook. It fits the Portege A30, A30-E-10K, A30-E-10N, A30-E-11E, and over 295 additional A30-series variants. OEM part number PA5331U-1BRS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA30-series cell compatibility:\u003c\/strong\u003e\n    All Portege A30 variants share the same 15.4V voltage rail, PA5331U-1BRS connector pinout, and BMS handshake protocol. That common architecture is why this single cell fits the full A30 lineup without modification.\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 an A30-E unit. The BMS negotiated correctly, protection circuits triggered at both overcharge and low-voltage cutoff thresholds, and the fuel gauge IC accepted the new cell after two calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration on the Portege A30:\u003c\/strong\u003e\n    After fitting this battery, run a full discharge to hibernate cutoff, then charge uninterrupted to 100% without unplugging. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Toshiba System Settings 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\"\u003eWhy the Portege A30 shuts down at 20–30% charge shown\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds calibration data from the old, degraded cell. Under full CPU and display load, the new cell's actual voltage profile doesn't match those stored values. The system reads the voltage curve as a drop-off and triggers an emergency shutdown before the real capacity is exhausted. Run two full discharge-to-hibernate then full-recharge cycles and the fuel gauge IC will relearn the voltage cliff of the new chemistry.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"Poor\" or \"Replace\" immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Portege A30 BIOS reads health status from EEPROM data written by the previous cell's charge history — not from a live measurement of the new cell. A fresh PA5331U-1BRS arrives with a clean EEPROM, which the BIOS interprets as an anomaly and flags as poor health. This is not a fault with the replacement cell. Boot into Toshiba System Settings, run the Battery Conditioning Wizard once, and the BIOS will overwrite the stale EEPROM health flag with fresh data from the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409643176026,"sku":"BWCS-TOX318NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409643208794,"sku":"BWCS-TOX318NB-2","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409643241562,"sku":"BWCS-TOX318NB-3","price":110.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOX318NB-1.webp?v=1779579941","url":"https:\/\/batteryweb.com\/products\/toshiba-dynabook-portege-a30-replacement-battery-154v-2700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}