{"product_id":"blackberry-z30-replacement-battery-38v-2800mah-li-polymer","title":"BlackBerry Z30 BAT-50136-001 Replacement Battery 3.8V 2800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlackBerry Z30 \/ STA100 Series — 3.8V Li-Polymer Replacement Battery (BAT-50136-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2800mAh Li-Polymer cell replacing the original battery in the BlackBerry Z30 and Z30 LTE smartphones. It fits STA100-1, STA100-2, and related STR100 variants sharing the same battery bay and connector. Cross-references include BAT-50136-001, BAT-50136-002, BAT-50136-101, BAT-50136-003, and CUWV1.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZ30 and STA100 platform fitment:\u003c\/strong\u003e\n    These models share an identical battery bay dimensions (111.66 × 56.86 × 3.40mm), the same 3.8V nominal rail, and a compatible BMS handshake with the Z30's charge IC — allowing a direct cell swap without adapters or firmware changes.\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 the Z30 platform. The BMS accepted charge-current handshake without triggering protective cutoff, and the fuel gauge IC registered cell capacity correctly after one full discharge-charge pass.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable any fast-charge mode and run one complete discharge-to-charge cycle before normal use. This gives the Z30's fuel gauge IC time to map the new cell's discharge curve accurately before high-current charging pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Z30 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Z30 uses a coulomb-counting fuel gauge IC that stores a discharge model built from the old cell's internal resistance and capacity curve. When a new cell goes in, that stored model no longer matches the physical cell. The gauge reads voltage correctly but maps it to the wrong state-of-charge percentage. One full discharge to automatic shutdown followed by a full charge to 100% forces the IC to re-anchor its endpoints and recalculate the curve against the new cell. After that cycle, percentage reporting stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't recalibrated yet and the cell voltage drops sharply under load from the modem or display backlight. The phone still shows 25% charge but actual cell voltage has already fallen below the BMS protection threshold — roughly 3.0V under load — triggering an immediate shutdown. It's not a faulty cell; it's an uncalibrated gauge reading a voltage cliff incorrectly. Run a full discharge cycle from 100% to automatic shutdown, then charge uninterrupted to 100%, and the shutdowns will stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404276170842,"sku":"BWCS-BRZ300XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404276203610,"sku":"BWCS-BRZ300XL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404276236378,"sku":"BWCS-BRZ300XL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BRZ300XL-1.webp?v=1779369550","url":"https:\/\/batteryweb.com\/products\/blackberry-z30-replacement-battery-38v-2800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}