{"product_id":"nexian-ia-003-replacement-battery-37v-1200mah-li-ion","title":"Nexian IA-003 Compatible Battery 3.7V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNexian IA-003 \/ NX-IA-003 — 3.7V Li-ion 1200mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1200mAh lithium-ion battery for the Nexian IA-003 and NX-IA-003 smartphones. It replaces the original cell when capacity has dropped to the point where the phone no longer holds a useful charge. Dimensions are 53.18 × 34.00 × 6.80mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIA-003 and NX-IA-003 fit:\u003c\/strong\u003e\n    Both model designations share the same physical battery bay, connector pinout, and charge IC handshake. One cell covers both variants 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 IA-003 platform. The BMS accepted charge without fault flags, and voltage held stable across a full discharge curve with no mid-cycle cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration on the IA-003:\u003c\/strong\u003e\n    On first use, disable any fast-charge mode and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on 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 Nexian IA-003 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still reading the old cell's discharge curve. The new cell hits a voltage cliff earlier than the IC expects — the phone cuts out before the percentage reaches zero. It is not a fault with the replacement cell. One full discharge-to-shutdown followed by an uninterrupted charge to 100% resets the coulomb counter and eliminates the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eIA-003 showing erratic percentage jumps after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC recalibrates in real time against the new cell during early cycles. Until it builds an accurate internal model, reported percentage can jump 5–15% between readings. This is a software state issue, not a defective cell. Run two full discharge-charge cycles without interruption and the readings stabilise — expect consistent reporting by the third cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405044154458,"sku":"BWCS-DEP330SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405044187226,"sku":"BWCS-DEP330SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405044219994,"sku":"BWCS-DEP330SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DEP330SL-1.webp?v=1779369842","url":"https:\/\/batteryweb.com\/products\/nexian-ia-003-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}