{"product_id":"tiptel-6011-replacement-battery-37v-1050mah-li-ion","title":"Tiptel AK54 Compatible Battery 3.7V 1050mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTiptel Ergophone 6011 — 3.7V Li-ion Replacement Battery (AK54)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1050mAh Li-ion cell for the Tiptel Ergophone 6010, 6011, and 6020 series mobile phones. It replaces OEM part number AK54 (also cross-referenced as SD474050A). Fit the cell when the original no longer holds a charge or the phone shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eErgophone 6010 \/ 6011 \/ 6020 compatibility:\u003c\/strong\u003e\n    These models share the same battery bay dimensions (53.00 × 33.90 × 5.60mm), the same 3.7V rail, and the same AK54 connector pinout — one cell covers the whole platform 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 full charge and discharge on the Ergophone platform. The BMS accepted the charge handshake cleanly, held voltage above 3.6V through mid-cycle, and triggered the low-voltage cutoff at the expected floor without false trips.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before it starts reporting accurate percentages on the status bar.\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 Ergophone 6011\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below what the modem and display draw can sustain — even though the fuel gauge still shows charge remaining. The original cell's discharge curve was mapped into the coulomb counter over many cycles. A new cell has a slightly different curve, so the OS cuts power before the gauge catches up. One full discharge-charge cycle without interruption resets the reference. After that, the shutdown threshold aligns with the new cell's actual voltage floor.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after fitting the replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Ergophone 6011 holds a learned model of the old cell's impedance and capacity. Drop in a new cell and that model is stale — the percentage can jump 10–15 points in either direction during the first few charge cycles. This is not a faulty cell. Let the phone discharge to auto-shutoff, then charge uninterrupted to 100%. Repeat once more if the jumps persist — two full cycles are usually enough for the counter to converge on the new cell's actual state of charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405111492698,"sku":"BWCS-HFC250SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405111525466,"sku":"BWCS-HFC250SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405111558234,"sku":"BWCS-HFC250SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HFC250SL-1.webp?v=1779369992","url":"https:\/\/batteryweb.com\/products\/tiptel-6011-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}