{"product_id":"samsung-galaxy-a70-replacement-battery-385v-4400mah-li-polymer","title":"Samsung Galaxy A70 EB-BA705ABU Replacement Battery 3.85V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy A70 — 3.85V Li-Polymer Replacement Battery (EB-BA705ABU)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4400mAh Li-Polymer replacement battery for the Samsung Galaxy A70 smartphone, including SM-A705F\/DS and SM-A705FN\/DS variants. It replaces OEM part numbers EB-BA705ABU, GH82-19746A, and EB-BA705ABE. It fits the original battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGalaxy A70 and A70 2019 compatibility:\u003c\/strong\u003e\n    All SM-A705 variants share the same physical cell dimensions (80.60 × 64.28 × 4.10mm), connector pinout, and BMS handshake protocol — one cell fits the full model range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an SM-A705F\/DS unit and confirmed BMS handshake, charge IC acceptance, and stable voltage delivery under screen-on and modem load without mid-cycle cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge-to-charge cycle. The fuel gauge IC uses this cycle to map the new cell's discharge curve — skipping it causes the percentage indicator to read against the old cell's data.\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 Galaxy A70 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC — a coulomb counter stored in the phone's baseband — is still calibrated to the old cell's voltage-to-capacity curve. A new cell hits its low-voltage cliff at a different state of charge. When the modem or display draws a current spike, the cell voltage sags below the shutdown threshold before the gauge reaches 0%. One full discharge cycle forces the coulomb counter to re-anchor against the new cell's actual discharge curve and eliminates premature shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first charge, the A70's charge IC runs a trickle phase to verify BMS integrity before negotiating fast charge protocols. If the charger shows standard charging only, this is expected behaviour on cycle one — not a fault in the cell or the charger. Let the first charge complete at standard rate without unplugging. On the second cycle, the charge IC re-initiates the fast charge handshake and the 25W protocol resumes. If fast charge still does not activate after cycle two, verify the cable supports high-current delivery — the limiting factor is usually the cable, not the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392011042906,"sku":"BWCS-SMA705SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392011075674,"sku":"BWCS-SMA705SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392011108442,"sku":"BWCS-SMA705SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMA705SL-1.webp?v=1779142920","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-a70-replacement-battery-385v-4400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}