{"product_id":"google-g12-replacement-battery-37v-1350mah-li-ion","title":"Google Nexus One BA S530 Replacement Battery 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGoogle Nexus One G12 \/ G15 — 3.7V Li-ion Replacement Battery (BA S530)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1350mAh Li-ion replacement cell for the Google Nexus One, covering Fit Models G12 and G15. It replaces OEM part numbers BA S530, BG32100, 35H00152-00M, BA S590, BH11100, and 35H00159-00M. The battery slots into the standard Nexus One battery bay and reconnects to the board via the original three-contact connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG12 and G15 platform fit:\u003c\/strong\u003e\n    Both models share the same 3.7V battery bay, three-pin board connector, and fuel gauge IC interface. One cell covers both variants without any modification to the contacts or housing.\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-discharge cycle on the Nexus One board. The BMS accepted charge handshake correctly, and the protection circuit tripped at the expected low-voltage cutoff without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable any fast-charge adapter and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the OS begins reporting percentage to the screen and modem.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nexus One reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nexus One uses a coulomb-counter fuel gauge IC that builds its state-of-charge model against the original cell's discharge curve. When a new cell goes in, that stored model no longer matches actual cell chemistry or impedance. The IC keeps estimating from the old baseline, which is why the percentage reading jumps around or stalls. One full discharge to device shutdown followed by an uninterrupted charge to 100% forces the IC to relearn the new curve and anchor the 0% and 100% endpoints correctly.\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 cell voltage drops below the modem's or display's minimum rail requirement under load, even though the fuel gauge still reads 20–30%. The fuel gauge IC is still calibrated to the old cell and does not yet know where the new cell's voltage cliff sits. Under a high-draw event — an LTE handshake, screen-on burst, or simultaneous sync — the cell voltage collapses faster than the IC predicts. Run two full discharge-charge cycles and the gauge will shift the shutdown threshold to match the new cell's actual low-voltage floor, typically around 3.2–3.3V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405090750554,"sku":"BWCS-HTS510SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405090783322,"sku":"BWCS-HTS510SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405090816090,"sku":"BWCS-HTS510SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTS510SL-1.webp?v=1779369955","url":"https:\/\/batteryweb.com\/products\/google-g12-replacement-battery-37v-1350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}