{"product_id":"blu-bold-n1-replacement-battery-38v-3300mah-li-polymer","title":"BLU BOLD N1 Replacement Battery 3.8V 3300mAh C736048350L","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU BOLD N1 — 3.8V Li-Polymer Replacement Battery (C736048350L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3300mAh lithium-polymer battery replaces the OEM cell in the BLU BOLD N1 smartphone. It fits the BOLD N1 directly, matching the original connector, cell dimensions (75.04 × 59.20 × 4.50mm), and BMS communication protocol. Capacity is 3300mAh — identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBOLD N1 platform fit:\u003c\/strong\u003e\n    The BOLD N1 uses a single-cell Li-Polymer pack at 3.8V nominal. The OEM BMS on this platform handshakes with the charge IC over a single-wire thermistor line. This cell carries the matching NTC thermistor, so the charge IC accepts it without throwing a fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, idle, and load draws that mirror screen-on and modem activity. The BMS held the 4.35V charge ceiling correctly and cut off at 3.0V on discharge without dropping to a lockout state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before fast charging pushes high current into 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 BOLD N1 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BOLD N1's fuel gauge IC holds a learned discharge curve from the old, degraded cell. When a fresh cell with a steeper, healthier voltage curve goes in, the IC misreads the state of charge. Under modem or display load, the cell voltage dips briefly below the shutdown threshold even though the reported percentage still reads high. One full discharge-to-charge cycle lets the coulomb counter reset against the new curve. After that cycle, shutdowns at 20–30% stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after installation, the charge IC may default to a slow trickle rate rather than engaging fast charge. This happens because the IC treats any new, uncalibrated cell as a potential recovery charge — it holds back current until it confirms the cell voltage is stable above 3.5V. Plug in, leave it alone, and let the first charge complete at whatever rate the IC sets. Fast charge re-engages normally on the second cycle once the IC has confirmed cell health.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391989940314,"sku":"BWCS-BLN100SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391989973082,"sku":"BWCS-BLN100SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391990005850,"sku":"BWCS-BLN100SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLN100SL-1.webp?v=1779142762","url":"https:\/\/batteryweb.com\/products\/blu-bold-n1-replacement-battery-38v-3300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}