{"product_id":"pharos-m619-replacement-battery-37v-1400mah-li-ion","title":"Pharos M619 PZX95 Replacement Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePharos M619 \/ Mercury 619 \/ Traveler 619 — 3.7V Li-ion Replacement Battery (PZX95)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1400mAh Li-ion cell that fits the Pharos M619, Mercury 619, and Traveler 619 smartphones. It replaces OEM part numbers PZX95 and A83TA000F. The cell matches the original's physical footprint at 70.50 × 58.00 × 4.50mm and uses the same connector pinout.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM619 \/ Mercury 619 \/ Traveler 619 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector layout, and charge IC interface. One cell covers the full range — no adapter or modification needed.\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 M619 platform. The BMS accepted the charge IC handshake without error flags, and voltage held stable across screen-on and modem-active load states.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.\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 replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M619's fuel gauge IC stores a discharge curve calibrated to the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The phone reads 25% remaining, but the cell's real voltage under modem load drops below the cutoff threshold — so the device shuts down. Running one full discharge down to automatic power-off, then charging uninterrupted to 100%, forces the coulomb counter to reset against the new cell's actual curve. After that cycle, the percentage readings track correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the M619 has been unused for several months, the cell voltage may have dropped below 2.5V — the point where the BMS locks out to prevent damage. The phone appears completely dead and does not respond to the power button. Connect the device to a wall charger, not a USB port, and leave it for 20–30 minutes without attempting to power it on. The charge IC applies a low-current trickle to bring the cell back above the BMS re-enable threshold, typically around 2.9V, before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405013024858,"sku":"BWCS-PTL619SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405013057626,"sku":"BWCS-PTL619SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405013090394,"sku":"BWCS-PTL619SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTL619SL-1.webp?v=1779369820","url":"https:\/\/batteryweb.com\/products\/pharos-m619-replacement-battery-37v-1400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}