{"product_id":"svp-3-agg-052-replacement-battery-37v-750mah-li-ion","title":"Nokia 3 AGG-052 Replacement Battery BBA-07 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSVP Nokia 3 AGG-052 \/ 600 \/ 700 Series — 3.7V Li-ion Replacement Battery (BBA-07)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 750mAh Li-ion cell built to the BBA-07 specification. It fits the Nokia 3 AGG-052, 600, 700, and AGG-02, among others in the same platform family. Voltage and connector match the original — the phone's charge IC sees it as a valid cell from first boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNokia 600 \/ 700 \/ AGG-02 platform compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V rail, BBA-07 connector pinout, and BMS handshake protocol. One cell covers the full group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle on a Nokia 600 test unit. The charge IC accepted the cell without error flags, BMS protection tripped correctly at the low-voltage cutoff, and the fuel gauge IC tracked state-of-charge through the full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one complete discharge-charge cycle before resuming normal use. The fuel gauge IC is still calibrated to the old cell's discharge curve — one full cycle resets its reference and prevents erratic percentage readings or premature low-battery warnings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nokia 3 AGG-052 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC uses a coulomb counter and a stored discharge curve to estimate charge state. When you swap to a new cell, that stored curve still reflects the old battery's impedance and capacity profile. The mismatch shows up as a percentage that jumps, sticks, or reads higher than actual charge. One full discharge to automatic shutoff followed by a complete charge resets the coulomb counter and rebuilds the curve against the new cell.\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 modem transmit bursts or screen-on load pull the cell voltage below the BMS cutoff threshold faster than the fuel gauge can track. A new cell with an uncalibrated fuel gauge IC has no accurate voltage-under-load model yet, so the phone shuts off before the displayed percentage reaches zero. The fix is the same recalibration cycle — one full discharge lets the IC map the real voltage cliff of the new cell. After calibration, shutdowns at 20–30% should stop; if they continue, check that the cell resting voltage reads at least 3.7V after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409494507610,"sku":"BWCS-NK4CXL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409494540378,"sku":"BWCS-NK4CXL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409494573146,"sku":"BWCS-NK4CXL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK4CXL-1.webp?v=1778213576","url":"https:\/\/batteryweb.com\/products\/svp-3-agg-052-replacement-battery-37v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}