{"product_id":"lenovo-zuk-z2-pro-replacement-battery-385v-3100mah-li-polymer","title":"Lenovo ZUK Z2 Pro Compatible Battery BL263 3.85V 3100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ZUK Z2 Pro — 3.85V Li-Polymer Replacement Battery (BL263)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3100mAh (11.94Wh) Li-Polymer replacement battery for the Lenovo ZUK Z2 Pro and its variants, including the Ultimate Edition, Ultimate Edition TD-LTE Dual SIM, and Exclusive Edition. It uses OEM part number BL263 and matches the original cell's dimensions at 75.00 × 59.60 × 4.40 mm. It fits directly into the ZUK Z2 Pro chassis without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZUK Z2 Pro variant compatibility:\u003c\/strong\u003e\n    The standard Z2 Pro, Ultimate Edition, TD-LTE Dual SIM, and Exclusive Edition all share the same battery bay dimensions and BL263 connector pinout. The BMS handshake is identical across these variants — same voltage rail, same NTC thermistor pin assignment.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge-discharge cycles on a ZUK Z2 Pro unit and monitored BMS communication. The protection circuit engaged correctly at both low-voltage cutoff and thermal thresholds. Capacity output matched the rated 3100mAh within acceptable tolerance.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC is calibrated to the old cell's discharge curve. Running one full cycle at standard current lets the coulomb counter reset its reference before high-current charging is applied to 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\"\u003eSudden shutdown at 20–30% on the ZUK Z2 Pro after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZUK Z2 Pro's fuel gauge IC maps voltage to percentage using a curve built from the original cell's internal resistance profile. A new cell has lower impedance, so its voltage-to-capacity curve differs from what the IC expects. Under modem or screen load, the device sees a voltage reading that the IC interprets as critically low — even when charge remains. The fix is one full discharge to auto-shutdown followed by a full charge to 100% at standard charge rate. After that cycle, the IC recalibrates and shutdowns at low percentages stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a battery swap, the charge IC on the ZUK Z2 Pro may not negotiate a fast-charge protocol on the first connection. The charge IC checks BMS state before stepping up current — a freshly installed cell with no charge history can cause the IC to default to standard 5V charging as a precaution. This is not a fault with the replacement cell or the charger. Complete one full charge at standard rate, then reconnect with your fast-charge adapter — the protocol negotiation completes normally from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392070877274,"sku":"BWCS-LVZ220SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392070910042,"sku":"BWCS-LVZ220SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392070942810,"sku":"BWCS-LVZ220SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVZ220SL-1.webp?v=1779143561","url":"https:\/\/batteryweb.com\/products\/lenovo-zuk-z2-pro-replacement-battery-385v-3100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}