{"product_id":"amazfit-gtr-47mm-replacement-battery-38v-400mah-li-polymer","title":"Amazfit GTR 47mm Replacement Battery 3.8V 400mAh Li-Polymer PL502625H","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit GTR 47mm — 3.8V Li-Polymer Replacement Battery (PL502625H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 400mAh Li-Polymer cell for the Amazfit GTR 47mm smartwatch (model A19029). It replaces OEM part PL502625H and fits directly into the original battery bay. Order this when the factory cell no longer holds a multi-day charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGTR 47mm and A19029 fitment:\u003c\/strong\u003e\n    Both model references share the same chassis and connector layout. The PL502625H footprint — 24.80 x 24.20 x 5.20mm — matches the original cavity without modification. The BMS handshake and connector polarity are identical across both designations.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the GTR 47mm platform. The fuel gauge IC accepted the new cell, completed its calibration routine, and the watch reported stable state-of-charge readings within one full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its charger immediately and charge to 100% before first use. The fuel gauge IC on this platform cannot calibrate its reference point without a full charge cycle from near-zero after a cell swap. Skip this step and the percentage display will drift.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GTR 47mm reports 0% straight after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GTR 47mm uses a fuel gauge IC that tracks state-of-charge by accumulating coulombs from a known reference point. When the old cell is removed, that reference is wiped. The IC wakes up with no calibration data and defaults to 0% until it can re-establish a baseline. A full charge to 100% immediately after the swap gives the IC the upper reference it needs. Do not use the watch until that first full charge completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not connecting on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GTR 47mm's magnetic charging contacts sit on the caseback and align within a narrow tolerance. If the caseback is seated even slightly off-axis during reassembly, the pogo pins on the charger miss the contact pads. The watch will show no charging animation and the battery will stay at 0%. Remove the caseback, re-seat it flat and even pressure around the full perimeter, then test alignment by checking for the charging indicator before closing the case fully.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416158371930,"sku":"BWCS-AMT190SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416158404698,"sku":"BWCS-AMT190SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416158437466,"sku":"BWCS-AMT190SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT190SH-1.webp?v=1779760504","url":"https:\/\/batteryweb.com\/products\/amazfit-gtr-47mm-replacement-battery-38v-400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}