{"product_id":"kyocera-duramax-replacement-battery-37v-1450mah-li-ion","title":"Kyocera DuraMax SCP-43LBPS Replacement Battery 3.7V 1450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKyocera DuraMax \/ E4210 \/ E4225 \/ E4277 — 3.7V Li-ion Replacement Battery (SCP-43LBPS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1450mAh Li-ion replacement battery for the Kyocera DuraMax and its E4210, E4225, and E4277 variants. It matches the original cell footprint at 53.90 × 34.00 × 7.20mm. OEM part numbers SCP-43LBPS and 5AAXBT048GEA both cross-reference to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDuraMax \/ E42xx series fit:\u003c\/strong\u003e\n    The E4210, E4225, and E4277 share the same battery bay dimensions, connector pinout, and BMS handshake protocol as the DuraMax — one cell covers the full group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a DuraMax unit. The BMS accepted the cell without a protection trip, and the fuel gauge IC registered a full 1450mAh draw before cutoff voltage was reached.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map its coulomb counter against the new cell's discharge curve before high-current charging begins on an uncalibrated cell.\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 DuraMax after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DuraMax modem and screen together draw enough current to cause a brief voltage sag on a new cell. If the fuel gauge IC is still calibrated to the old cell's discharge curve, it misreads remaining capacity. The phone's protection circuit then sees a voltage reading that falls below the shutdown threshold — even though the cell has charge left. One full discharge-charge cycle without fast charging resets the coulomb counter and clears this behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting erratic or jumping battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the fuel gauge IC carries forward calibration data from the old cell. The new cell's impedance and discharge curve differ enough that the percentage readout can jump — sometimes several points in either direction — during normal use. This is a calibration mismatch, not a fault in the cell itself. Charge the phone to 100%, allow it to discharge fully without interruption, then recharge to 100% to give the IC a clean reference cycle. The readout stabilises at 3.7V nominal after that cycle completes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404347441242,"sku":"BWCS-KY4210SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404347474010,"sku":"BWCS-KY4210SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404347506778,"sku":"BWCS-KY4210SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KY4210SL-1.webp?v=1779369806","url":"https:\/\/batteryweb.com\/products\/kyocera-duramax-replacement-battery-37v-1450mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}