{"product_id":"simvalley-easy-5-replacement-battery-37v-900mah-li-ion","title":"Simvalley Easy 5 Replacement Battery PX-3371-912 3.7V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSimvalley Easy 5 \/ Easy 5 Plus — 3.7V Li-ion Replacement Battery (PX-3371-912)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh Li-ion cell for the Simvalley Easy 5 and Easy 5 Plus compact mobile phones. It replaces OEM parts PX-3371-912 and PX-3446-675. Dimensions are 53.00 × 34.00 × 4.30mm — verify against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEasy 5 and Easy 5 Plus compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions and 3.7V supply rail. The connector pinout and BMS handshake are identical across the Easy 5 and Easy 5 Plus variants, so one cell covers both.\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 Easy 5 platform. The onboard BMS accepted the cell without fault codes, and charge termination triggered correctly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge recalibration:\u003c\/strong\u003e\n    After installation, run one complete discharge to low battery warning, then charge to 100% without interruption. The fuel gauge IC on the Easy 5 calibrates its coulomb counter against the new cell's discharge curve during this first cycle — skipping it causes percentage jumps for several 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 Easy 5 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Easy 5 uses a fuel gauge IC that builds its capacity model from accumulated charge and discharge data. When you install a new cell, that model still references the old cell's degraded curve. The IC reads the new cell's higher open-circuit voltage against outdated reference points and reports inflated or inconsistent percentages. One full uninterrupted discharge-charge cycle resets the learned curve to match the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–25% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet recalibrated and the cell hits a voltage cliff under load — typically during a call or screen-on burst — before the reported percentage reaches zero. The BMS trips the output at approximately 3.0V per cell to prevent over-discharge damage. The fix is the same first-cycle calibration run: discharge fully until the phone shuts itself down, then charge uninterrupted to 100%. After that cycle, the IC maps the real voltage-to-capacity curve and cutoff aligns with the displayed percentage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405016367194,"sku":"BWCS-DEP510SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405016399962,"sku":"BWCS-DEP510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405016432730,"sku":"BWCS-DEP510SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP510SL_1.webp?v=1779369805","url":"https:\/\/batteryweb.com\/products\/simvalley-easy-5-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}