{"product_id":"emporia-active-v50-replacement-battery-37v-1050mah-li-ion","title":"Emporia Active V50 4G Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEmporia Active V50 — 3.7V Li-ion Replacement Battery (AK-V50-4G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1050mAh Li-ion battery for the Emporia Active V50 and Active V50 4G. It replaces OEM part AK-V50-4G directly. The Active V50 is a senior-oriented mobile phone — this battery restores its core functions: calls, texts, and basic navigation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eActive V50 and Active V50 4G fit:\u003c\/strong\u003e\n    Both variants run the same 3.7V cell footprint and share the AK-V50-4G connector and BMS handshake. The 4G model adds a modem radio, which draws burst current during LTE connection — the cell specification accounts for that load.\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 Active V50 4G. The BMS accepted charge from the stock charger without fault flags. Voltage held steady across modem-active periods with no premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, run one complete discharge down to auto-shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a full reference curve against the new cell before it starts reporting accurate percentages.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Active V50 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Active V50 uses a fuel gauge IC that builds its charge estimate from the discharge curve of the original cell. A new cell has a different impedance profile, so the IC's coulomb counter starts out of sync. This shows up as the percentage jumping around or stalling at a fixed number. One full discharge-charge cycle resets the reference and brings the reported percentage back in line with actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the modem's minimum operating threshold under LTE load — even though the OS still shows charge remaining. The fuel gauge reads average voltage, but a burst transmission pulls instantaneous current that drops cell voltage below 3.2V momentarily, triggering a protective shutdown. It is most common in the first few cycles before the IC recalibrates. After two full discharge-charge cycles, the cutoff point typically shifts back toward the expected low single-digit percentage range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404197396570,"sku":"BWCS-EAV540SL-1","price":30.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43404197429338,"sku":"BWCS-EAV540SL-2","price":35.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43404197462106,"sku":"BWCS-EAV540SL-3","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EAV540SL-1.webp?v=1779369289","url":"https:\/\/batteryweb.com\/products\/emporia-active-v50-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}