{"product_id":"gsmart-roma-r2-replacement-battery-37v-1400mah-li-ion","title":"GSmart Roma R2 Replacement Battery 3.7V 1400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGSmart Roma R2 — 3.7V Li-ion Replacement Battery (R2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1400mAh Li-ion cell for the GSmart Roma R2 smartphone. It replaces the original R2 battery when the factory cell has degraded and can no longer hold a usable charge. Dimensions are 65.00 × 48.05 × 4.50mm — same form factor as the OEM unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRoma R2 fit:\u003c\/strong\u003e\n    The R2 part number covers both Roma R2 variants listed in the fit data. The connector pinout, physical dimensions, and voltage rail match the original cell, so the phone's charge IC accepts the swap without modification.\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 a Roma R2 unit. The BMS accepted charge from the stock charger on the first connection, and the protection circuit tripped correctly at low-voltage cutoff during deep discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging if your charger supports it and run one full discharge-charge cycle at standard rate. This lets the fuel gauge IC build an accurate discharge curve against the new cell before the OS starts reading percentage from it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Roma R2 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity problem. Under peak modem or screen load, the new cell's internal resistance causes a momentary voltage drop that falls below the BMS cutoff threshold — the phone shuts down even though the fuel gauge still shows charge remaining. It happens most often during calls or video playback because those loads spike current demand faster than the fuel gauge IC can track. Running one full discharge-charge cycle at standard rate brings the coulomb counter into alignment with the actual cell curve and reduces these events significantly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRoma R2 not powering on after battery sat in storage\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell voltage drops below approximately 2.5V, the BMS enters lockout and blocks normal charge current to protect the cell. The phone will show nothing on screen when you press power. Connect it to the original wall adapter — not a PC USB port — and leave it for 15–20 minutes before attempting to power on. The charge IC on the Roma R2 delivers a trickle recovery current that brings the cell back above the BMS re-enable threshold, typically around 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404290654298,"sku":"BWCS-GSR200SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404290687066,"sku":"BWCS-GSR200SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404290719834,"sku":"BWCS-GSR200SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GSR200SL-1.webp?v=1779369643","url":"https:\/\/batteryweb.com\/products\/gsmart-roma-r2-replacement-battery-37v-1400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}