{"product_id":"blu-cubo-replacement-battery-37v-1100mah-li-ion","title":"BLU Cubo N6F10T Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU Cubo — 3.7V Li-ion Replacement Battery (N6F10T)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement battery for the BLU Cubo smartphone. It fits the Cubo directly, using OEM part number N6F10T. Swap it in when the original cell can no longer hold a full charge across a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBLU Cubo fit:\u003c\/strong\u003e\n    The Cubo uses a compact 46.00 × 40.10 × 6.30mm cell at 3.7V. This replacement matches that footprint and voltage rail exactly, so the BMS handshake and connector alignment carry over 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 the bench. The BMS held cutoff correctly at both ends — no over-voltage trip at the top and clean low-voltage shutoff before the cell could be damaged.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one full discharge-to-charge cycle before normal use. The fuel gauge IC on the Cubo is calibrated against the old cell's discharge curve — one full cycle lets it remap against the new cell and report accurate 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 BLU Cubo reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Cubo's fuel gauge IC tracks charge state using a coulomb counter tuned to the original cell's discharge curve. A new cell has a slightly different impedance profile, so the counter starts misreading state-of-charge immediately. The phone may show 80% when the cell is already near cutoff voltage, or drop from 40% to 0% without warning. One complete discharge-to-shutdown followed by a full uninterrupted charge resets the reference points the IC uses for future readings.\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 modem or display draws a high current spike and the cell voltage drops below the BMS cutoff threshold faster than the fuel gauge can track. The percentage shown is stale — the actual cell voltage has already crossed the protection floor. It is most common in the first few cycles before the coulomb counter recalibrates. Run the recalibration cycle first; if shutdowns continue after two full cycles, check that the battery connector is fully seated and that terminal voltage at rest reads at least 3.6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409489657946,"sku":"BWCS-NK6FSL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409489690714,"sku":"BWCS-NK6FSL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409489723482,"sku":"BWCS-NK6FSL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK6FSL-1.webp?v=1779579815","url":"https:\/\/batteryweb.com\/products\/blu-cubo-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}