{"product_id":"razer-blade-15-2020-replacement-battery-154v-4200mah-li-polymer","title":"Razer Blade 15 2020 RC30-0328 Replacement Battery 15.4V 4200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRazer Blade 15 2020\/2021 — 15.4V Li-Polymer Replacement Battery (RC30-0328)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 4200mAh (64.68Wh) Li-Polymer replacement battery for the Razer Blade 15 2020 and 2021 series, including RZ09-0330x and RZ09-03305x variants. It replaces OEM part RC30-0328 when the original cell degrades or fails to hold charge. Fits the standard battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRZ09-0330x and RZ09-03305x compatibility:\u003c\/strong\u003e\n    These Blade 15 variants share the same 15.4V battery rail, physical footprint, and connector pinout as the 2020 base model — the RC30-0328 part number covers all of them from the factory.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Blade 15 2020 unit. The BMS accepted the new cell without fault codes, and the charge controller advanced through each stage correctly to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle:\u003c\/strong\u003e\n    After fitting, run the laptop on battery until it hibernates at low-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate 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\"\u003eWhy the Blade 15 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blade 15 fuel gauge IC builds a discharge map against the old cell's internal resistance profile. After a swap, that map no longer matches the new cell's voltage curve, so the system reads an early voltage cliff and triggers an emergency shutdown. The fix is calibration — not a faulty battery. Run two to three full discharge-to-hibernate and uninterrupted-charge cycles. After that, the fuel gauge IC recalibrates its endpoint model and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blade 15 BIOS reads health data from EEPROM registers that were written by the original cell's charge history. A new cell arrives with fresh cycle counts and different EEPROM state, which the BIOS interprets as a mismatch and flags as poor health. This is a reporting artefact, not a hardware fault. Complete the full discharge-to-hibernate cycle described above — once the BIOS battery learn cycle finishes, the health status corrects to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409595727962,"sku":"BWCS-RZB152NB-1","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409595760730,"sku":"BWCS-RZB152NB-2","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409595793498,"sku":"BWCS-RZB152NB-3","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RZB152NB-1.webp?v=1779580146","url":"https:\/\/batteryweb.com\/products\/razer-blade-15-2020-replacement-battery-154v-4200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}