{"product_id":"emporia-telme-c145-replacement-battery-37v-900mah-li-ion","title":"Emporia AK-C145 Telme C145 Replacement Battery 3.7V 900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEmporia Telme C145 — 3.7V Li-ion Replacement Battery (AK-C145)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 900mAh Li-ion battery replaces the original AK-C145 cell in the Emporia Telme C145 candybar mobile phone. It fits the Telme C145 directly, restoring power to a phone built around straightforward calling and messaging. Dimensions are 46.47 × 39.79 × 5.33mm — check these against your original before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTelme C145 fitment:\u003c\/strong\u003e\n    The C145 uses a removable battery bay with a simple connector and no proprietary BMS handshake beyond basic cell voltage recognition. The AK-C145 form factor is specific to this model — no cross-compatibility with other Emporia lines.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full discharge and charge on the Telme C145 platform. The BMS accepted the new cell without lockout, and charge termination triggered correctly at full voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After fitting this battery, run one complete discharge to near-empty followed by a full uninterrupted charge before relying on the percentage indicator. The phone's fuel gauge IC is calibrated against the old cell's discharge curve — one full cycle resets it to the new cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Telme C145 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Telme C145 uses a simple fuel gauge IC that tracks capacity by mapping voltage against a stored discharge curve from the original cell. When you install a new cell, that stored curve no longer matches the actual discharge behaviour of the fresh battery. The phone may show 100% immediately after a short charge, then drop suddenly to a lower figure. One full discharge-to-charge cycle lets the IC relearn the new cell's voltage profile and report accurately.\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 fuel gauge IC still holds the degraded curve of the old cell and miscalculates the remaining charge. Under load — an incoming call or screen wake — the cell voltage drops faster than the IC expects, tripping the low-voltage cutoff before the displayed percentage reaches zero. The fix is the same: complete one full discharge cycle so the IC maps the new cell's actual voltage cliff. After that cycle, the shutdowns should stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404299206746,"sku":"BWCS-EAC145XL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404299239514,"sku":"BWCS-EAC145XL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404299272282,"sku":"BWCS-EAC145XL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EAC145XL-1.webp?v=1779369642","url":"https:\/\/batteryweb.com\/products\/emporia-telme-c145-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}