{"product_id":"digma-e601hd-replacement-battery-37v-1700mah-li-ion","title":"EB-4L Digma E601hd Replacement Battery 3.7V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDigma E601hd — 3.7V Li-ion Replacement Battery (EB-4L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1700mAh Li-ion cell built to replace the original EB-4L battery in the Digma E601hd smartphone. It fits the E601hd directly, restoring power to a phone that no longer holds charge or fails to power on. Capacity figure comes from the product specification, not an estimate.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE601hd cell compatibility:\u003c\/strong\u003e\n    The E601hd uses a single-cell 3.7V Li-ion pack with a low-current BMS matched to the phone's charge IC. The EB-4L replacement matches that voltage rail and connector pinout, so the charge IC recognises the cell and begins the standard CC\/CV charge cycle without flagging an error.\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 bench, confirmed the BMS did not trip on modem-load current draw, and verified the charge IC accepted the cell on the first connection without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use after fitting this cell, disable fast charging if the E601hd supports it, then run one complete discharge down to automatic shutdown followed by a full charge. This lets the coulomb counter recalibrate its end-of-charge and end-of-discharge thresholds against the new cell's actual discharge curve.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E601hd reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe E601hd's fuel gauge IC stores a learned discharge curve from the original cell. 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 and maps it to a percentage using old data, so the number shown can be 10–20% off in either direction. One full discharge-to-shutdown cycle followed by a complete charge resets the coulomb counter and brings the percentage reading back in line with actual remaining capacity.\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 cell voltage drops below the BMS cutoff threshold under load — typically when the modem or screen pulls current the resting-voltage reading suggested the cell could still supply. A fresh cell with an uncalibrated fuel gauge will show 25% remaining while the actual open-circuit voltage is already near 3.5V. Under modem transmit load, that drops fast and hits the 3.0V cutoff before the percentage reaches zero. Run one full calibration cycle first; if shutdowns continue after that, check that the charge IC is reaching 4.2V at end of charge before unplugging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405029441626,"sku":"BWCS-NK4LXL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405029474394,"sku":"BWCS-NK4LXL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405029507162,"sku":"BWCS-NK4LXL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK4LXL-1.webp?v=1778611065","url":"https:\/\/batteryweb.com\/products\/digma-e601hd-replacement-battery-37v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}