{"product_id":"blu-studio-g-hd-replacement-battery-37v-1600mah-li-ion","title":"BLU Studio G HD Replacement Battery 3.7V 1600mAh C766004220L","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU Studio G HD \/ S170 — 3.7V Li-ion Replacement Battery (C766004220L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1600mAh Li-ion cell replaces the original C766004220L battery in the BLU Studio G HD and S170. It fits the removable battery bay directly and restores standard charging and power behaviour. Capacity is 1600mAh — 5.92Wh — matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStudio G HD and S170 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and charge IC handshake. One cell covers both devices — no adapter or modification needed.\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 Studio G HD platform. The BMS communicated correctly with the charge IC, held cutoff voltage at the expected threshold, and showed no false low-battery trips under screen and modem load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting a new cell, disable fast charging if available and run one complete discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a clean discharge curve from the new cell before it begins tracking coulombs accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Studio G HD reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Studio G HD learns cell behaviour over time and stores a discharge curve from the old battery. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The gauge reads voltage, compares it against the old curve, and outputs a percentage that can be 10–20% off. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the IC to rewrite its reference curve against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — modem transmit bursts and screen backlighting can pull the cell below the BMS protection threshold even though the gauge still shows charge remaining. The BMS trips a hard cutoff to protect the cell, and the phone shuts off. It is not a faulty battery — it is the fuel gauge IC still working from a stale calibration curve. After one full recalibration cycle, the gauge tracks the real voltage cliff correctly and shutdown moves back to the expected 5–10% range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392036667482,"sku":"BWCS-BLS170SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392036700250,"sku":"BWCS-BLS170SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392036733018,"sku":"BWCS-BLS170SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLS170SL-1.webp?v=1779143086","url":"https:\/\/batteryweb.com\/products\/blu-studio-g-hd-replacement-battery-37v-1600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}