{"product_id":"samsung-gear-2-replacement-battery-37v-250mah-li-polymer","title":"Samsung Gear 2 Replacement Battery 3.7V 250mAh PGF582224H","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Gear 2 \/ SM-R380 \/ SM-R381 — 3.7V Li-Polymer Replacement Battery (PGF582224H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 250mAh Li-Polymer cell (0.93Wh) built to the same physical and electrical spec as the original Samsung Gear 2 battery. It fits the SM-R380, SM-R381, and Gear 2 Neo — all three share the same battery bay and connector. Use this when the original cell no longer holds a charge or the watch shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-R380, SM-R381, and Gear 2 Neo compatibility:\u003c\/strong\u003e\n    These three variants use the same 25.62 × 21.02 × 5.82mm cell footprint, identical connector pinout, and the same BMS handshake protocol. Swapping between them is not an issue — the fuel gauge IC reads the same cell chemistry on all three boards.\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 SM-R380 platform. The BMS accepted the new cell without fault codes, and the fuel gauge updated state-of-charge correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after cell swap:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC on Gear 2 hardware cannot calibrate its reference point without a complete charge cycle from near-zero following a cell swap. Skipping this step causes the percentage to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Gear 2 drains faster with always-on display and continuous heart rate active\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Gear 2 heart rate sensor draws continuous current when monitoring is set to automatic — this is a known high-drain configuration for a 250mAh cell. Always-on display adds a steady backlight load on top of that. Together, these two settings can push total draw well above what the cell was sized for in standby-only use. If multi-day life is the goal, set heart rate monitoring to manual and let the display sleep — that alone significantly reduces average current draw on this cell size.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery during a swap kills the BLE session state stored in volatile memory — the watch loses its active pairing context. The phone-side Gear Manager or Galaxy Wearable app still shows the watch as paired, but the watch itself no longer holds a valid session key. Open the Galaxy Wearable app on the phone, remove the Gear 2 from the paired devices list, then re-pair from scratch using the watch's Bluetooth settings menu. The pairing completes within about 30 seconds once both sides are cleared.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416173838426,"sku":"BWCS-SMR380SH-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416173871194,"sku":"BWCS-SMR380SH-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416173903962,"sku":"BWCS-SMR380SH-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR380SH-1.webp?v=1779760565","url":"https:\/\/batteryweb.com\/products\/samsung-gear-2-replacement-battery-37v-250mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}