{"product_id":"telstra-gc900f-replacement-battery-37v-900mah-li-ion","title":"Telstra GC900f Replacement Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTelstra GC900f — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 900mAh Li-ion cell replaces the original battery in the LG GC900f (sold under the Telstra brand). It fits both the GC900f and GC-900f variants. The cell matches the original voltage rail and physical dimensions — 46.86 × 37.01 × 5.39mm — for a direct fit in the battery bay.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGC900f and GC-900f compatibility:\u003c\/strong\u003e\n    Both model designations refer to the same hardware platform. They share an identical battery bay, connector pinout, and charge IC interface — this cell works across both 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 load on the GC900f platform. The BMS accepted the cell without a handshake error, and the charge IC completed a full cycle without thermal cutoff or early termination.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to automatic shutdown before recharging. The GC900f's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step causes the percentage readout to drift or jump erratically during normal use.\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 GC900f after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe GC900f shuts down mid-use — not because the cell is empty, but because it cannot hold voltage under the combined load of the modem radio and screen backlight. A new cell with a slightly different internal resistance curve hits a voltage cliff the BMS reads as a cutoff condition before the fuel gauge catches up. This is common in the first two or three cycles on a replacement cell. Running one complete discharge-charge cycle without interruption lets the coulomb counter resync to the new cell's actual capacity and resistance profile. After that, shutdowns at 20–30% reported charge should stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone feels warm near the battery compartment during first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new high-impedance cell dissipates more heat during the constant-current phase of charging than a worn cell does. On the GC900f, the charge IC doesn't reduce current for a new cell — it pushes the same current it used on the degraded original. This is normal for the first one or two cycles and not a sign of a faulty cell. If warmth continues past the third full charge, check that the battery contacts are clean and making full contact — a dirty contact increases resistance and adds heat at the interface point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405142065242,"sku":"BWCS-LGC900SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405142098010,"sku":"BWCS-LGC900SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405142130778,"sku":"BWCS-LGC900SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LGC900SL-1.webp?v=1779370262","url":"https:\/\/batteryweb.com\/products\/telstra-gc900f-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}