{"product_id":"zkteco-zk-255-replacement-battery-37v-3000mah-li-polymer","title":"ZKTeco YT105050 Replacement Battery 3.7V 3000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZKTeco ZK-255 \/ AQD-V43-W — 3.7V Li-Polymer Replacement Battery (YT105050)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 3000mAh Li-Polymer replacement battery for the ZKTeco ZK-255 and the Multifunctional Air Quality Detector AQD-V43-W. It uses OEM part number YT105050 and matches the original cell footprint at 49.60 × 49.50 × 9.70mm. If your instrument is shutting down in the field or no longer holding charge, this pack replaces the original cell directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZK-255 and AQD-V43-W compatibility:\u003c\/strong\u003e\n    Both devices run the same 3.7V single-cell architecture with identical connector pinout and BMS handshake protocol. The YT105050 part number covers both units — the air quality detector and the ZK-255 share the same battery bay and protection circuit interface.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack under sensor-active load conditions and monitored BMS response during probe initialisation. The protection circuit handled the brief current spike at sensor power-up without triggering a false cutoff, and the cell voltage remained stable across a sustained logging session.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration on the ZK-255:\u003c\/strong\u003e\n    After installing this pack, run a full calibration cycle through the instrument menu before field deployment. The ZK-255 maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session even when the pack is fully charged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eZK-255 shutting down mid-measurement with battery showing charged\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ZK-255 draws a brief current spike each time the sensor array initialises or a new probe module powers up. If the cell's internal resistance has climbed — common in aged Li-Polymer packs — that spike pulls the terminal voltage below the BMS cutoff threshold for a fraction of a second. The instrument interprets this as a dead battery and shuts off even if the state of charge reads high. A fresh cell with lower internal resistance keeps the voltage rail stable through those transient loads and prevents nuisance shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack will not charge after the instrument sat unused for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge over time. If the ZK-255 sat in a case for several months, the pack may have dropped below 2.5V — the threshold where most BMS circuits lock out to prevent cell damage. The charger sees the lock and stops, so the instrument shows no charging activity. Connect the device to a charger and leave it for 45–60 minutes without interruption; some BMS circuits re-initialise through a trickle-charge recovery cycle once voltage climbs back above 2.8V. If the pack still does not respond, the original cell is below recovery voltage and needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360457064538,"sku":"BWCS-ZTK255SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360457097306,"sku":"BWCS-ZTK255SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360457130074,"sku":"BWCS-ZTK255SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTK255SL-1.webp?v=1778615901","url":"https:\/\/batteryweb.com\/products\/zkteco-zk-255-replacement-battery-37v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}