{"product_id":"acer-aspire-switch-11-sw5-173-replacement-battery-76v-4400mah-li-polymer","title":"Acer Aspire Switch 11 SW5-173 Replacement Battery 7.6V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Aspire Switch 11 SW5-173 — 7.6V Li-Polymer Replacement Battery (AP15B8K)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V 4400mAh (33.44Wh) Li-Polymer cell for the Acer Aspire Switch 11 SW5-173 and SW5-173P detachable 2-in-1. It replaces OEM part numbers AP15B8K, KT.0020G.005, and AP15B8K (2ICP3\/100\/107). The original cell degrades after repeated charge cycles — this replacement restores full charge capacity to the tablet chassis.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSW5-173 and SW5-173P compatibility:\u003c\/strong\u003e\n    Both models use the same battery bay dimensions (215.12 x 140.90 x 3.36mm), identical 7.6V rail, and the same BMS connector pinout. The fuel gauge IC communicates over SMBus — the cell must match voltage exactly or the BIOS flags it as unknown.\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 SW5-173 platform. The BMS accepted the cell without faulting, charge current tapered correctly at the top-of-charge threshold, and the SMBus handshake reported accurate state-of-charge to the OS.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the SW5-173:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the device hibernates at cutoff voltage, 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\"\u003eBIOS reporting battery health as poor after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SW5-173 BIOS reads health status from EEPROM data stored during previous charge cycles on the original cell. When a new cell goes in, the old cycle count and capacity records don't match the fresh chemistry — the BIOS flags it as degraded. This is a firmware state issue, not a fault with the replacement. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% to trigger the learn cycle reset. After two to three full cycles, the health indicator typically returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSwitch 11 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The IC still references the old cell's discharge profile, so it calls 0% too early — the device cuts power while the display still shows charge remaining. The fix is a full calibration cycle: discharge completely to hibernate cutoff, then charge to 100% without interruption. Repeat twice. After that, the gauge IC maps the new curve correctly and shutdowns should stop occurring above 5% reported charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409753407578,"sku":"BWCS-ACW173NB-1","price":62.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409753440346,"sku":"BWCS-ACW173NB-2","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409753473114,"sku":"BWCS-ACW173NB-3","price":81.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACW173NB-1.webp?v=1779580715","url":"https:\/\/batteryweb.com\/products\/acer-aspire-switch-11-sw5-173-replacement-battery-76v-4400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}