{"product_id":"pantech-pn-315-replacement-battery-37v-800mah-li-ion","title":"PBR-315 Pantech PN-315 Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePantech PN-315 — 3.7V Li-ion Replacement Battery (PBR-315)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-ion battery for the Pantech PN-315 smartphone. It replaces OEM part number PBR-315 and fits directly into the PN-315 handset. Use it when the original cell has degraded past the point of holding a usable charge through a normal day of calls and messaging.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePN-315 fit confirmation:\u003c\/strong\u003e\n    The PN-315 uses a fixed 3.7V single-cell Li-ion configuration with a proprietary contact layout. This cell matches that voltage rail and connector pinout — no modification needed to seat it correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the PN-315 charge IC and confirmed the BMS handshake completed without fault flags. The charge cycle accepted current normally from zero to full without interruption or thermal cutoff events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. This lets the PN-315 fuel gauge IC map its coulomb counter to the new cell's actual discharge curve and stop reporting inaccurate percentages.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PN-315 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PN-315 uses a fuel gauge IC that learns the discharge curve of the installed cell over time. When you swap in a new cell, the IC is still calibrated to the old cell's internal resistance profile. This mismatch causes the reported percentage to diverge from actual state of charge — sometimes by 15–20%. One complete discharge-charge cycle resets the coulomb counter reference and brings the display reading back into alignment.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the phone's processor, modem radio, or screen draw a current spike the cell cannot sustain without voltage sagging below the BMS cutoff threshold. The display shows 25% remaining, but under load the cell voltage drops sharply — the BMS trips and the phone cuts out instantly. It is not a faulty battery. Charge to 100%, complete one full discharge cycle, and check that the shutdown threshold rises above the 3.0V floor the BMS uses to protect the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405127778394,"sku":"BWCS-NK315SL-1","price":22.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405127811162,"sku":"BWCS-NK315SL-2","price":25.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405127843930,"sku":"BWCS-NK315SL-3","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK315SL-big.webp?v=1779369993","url":"https:\/\/batteryweb.com\/products\/pantech-pn-315-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}