{"product_id":"pharos-ptl600-replacement-battery-37v-3000mah-li-polymer","title":"Pharos PTL600 Replacement Battery PZX33 3.7V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePharos PTL600 \/ PTL600E — 3.7V Li-Polymer Replacement Battery (PZX33)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3000mAh Li-Polymer cell for the Pharos PTL600 and PTL600E smartphones. It replaces OEM part PZX33 when the original cell no longer holds a usable charge or has swollen. Capacity figure is 11.1Wh at nominal voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePTL600 and PTL600E compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — a single cell revision covers both. The PZX33 part number is consistent across both model suffixes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the cell through a full discharge and charge sequence on a PTL600 unit, confirmed BMS communication across all three pins, and verified the charge IC accepted the cell without a fault flag on the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current session runs against an uncalibrated baseline.\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 PTL600 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PTL600's modem and display together draw a burst current the new cell must sustain at low state-of-charge. If the fuel gauge IC is still calibrated to the old, degraded cell curve, it misreads remaining capacity. The phone hits the hardware voltage floor — around 3.2V under load — before the OS percentage reaches zero. One full slow-rate discharge cycle resets the coulomb counter and eliminates most premature shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePTL600 not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage. If the cell drops below approximately 2.5V per cell, the BMS enters lockout to prevent damage — the phone will not respond to the power button or a standard charger. Connect to a USB charger and leave it untouched for 20–30 minutes; the charge IC applies a trickle pre-charge that slowly recovers cell voltage above the BMS re-enable threshold. Once the cell reaches roughly 3.0V, the BMS releases and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405148520538,"sku":"BWCS-EX500HL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405148553306,"sku":"BWCS-EX500HL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405148586074,"sku":"BWCS-EX500HL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EX500HL-1.webp?v=1779370297","url":"https:\/\/batteryweb.com\/products\/pharos-ptl600-replacement-battery-37v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}