{"product_id":"benq-p50-replacement-battery-37v-1800mah-li-polymer","title":"BenQ P50 Replacement Battery 3.7V 1800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBenQ P50 — 3.7V Li-Polymer Replacement Battery (23.20115.102)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1800mAh Li-Polymer battery for the BenQ P50 smartphone. It replaces OEM part number 23.20115.102 when the original cell can no longer hold a usable charge. Dimensions are 53.11 × 34.07 × 5.31mm — verify fit before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBenQ P50 compatibility:\u003c\/strong\u003e\n    The P50 uses a single-cell Li-Polymer pack at 3.7V nominal with a fixed connector and BMS handshake tied to part number 23.20115.102. This replacement matches that voltage rail and connector — the charge IC communicates with the BMS the same way it did with the factory cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a P50 unit, confirming BMS handshake, charge cutoff at 4.2V, and stable voltage delivery under screen and modem load without triggering low-voltage protection prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. The P50's fuel gauge IC was calibrated to the original cell's discharge curve — giving it one full cycle on the new cell before fast charge resumes lets it map the new curve accurately.\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 BenQ P50 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still references the discharge curve of the old, degraded cell. When the new cell hits a voltage point the IC associates with low charge, it signals shutdown — even though actual capacity remains. The P50's modem and display draw brief high-current spikes that accelerate this voltage cliff if the gauge is miscalibrated. One full discharge down to automatic shutoff, followed by a complete charge to 100%, forces the coulomb counter to reset against the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBenQ P50 not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge in storage and can drop below 2.5V per cell, which triggers a BMS lockout designed to prevent damage from over-discharge. The P50 will show no response — no boot, no charge indicator — when the BMS is in this locked state. Connect the phone to a wall charger rather than USB for at least 20–30 minutes without pressing any buttons; the charge IC will trickle current into the cell until it recovers above the BMS re-enable threshold of approximately 2.9V. Once the charge LED activates, the BMS has re-initialised and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409462263898,"sku":"BWCS-BQ50SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409462296666,"sku":"BWCS-BQ50SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409462329434,"sku":"BWCS-BQ50SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BQ50SL-1.webp?v=1779579784","url":"https:\/\/batteryweb.com\/products\/benq-p50-replacement-battery-37v-1800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}