{"product_id":"emporia-emporia-elson-el350-replacement-battery-37v-1200mah-li-ion","title":"Emporia Elson EL350 Replacement Battery BTY26169 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEmporia Elson EL350 Series — 3.7V Li-ion Replacement Battery (BTY26169)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion cell for the Emporia Elson EL350 and EL350 Dual, and the equivalent Mobistel EL350 and EL350 Dual variants. It replaces OEM part BTY26169. Use this when the original cell no longer holds a charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEL350 and Mobistel EL350 compatibility:\u003c\/strong\u003e\n    Both the Emporia and Mobistel-branded EL350 models share the same battery bay dimensions, connector pinout, and BMS handshake requirements. The Emporia and Mobistel versions were sold under different regional branding but use identical hardware — this cell fits all four variants listed above.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on EL350 hardware and confirmed BMS communication, correct charge termination, and stable voltage delivery under call and display load. The fuel gauge IC accepted the new cell without triggering fault flags.\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 full discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter to 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 EL350 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EL350's modem and display pull current spikes that expose a voltage cliff in aged or freshly installed cells before calibration. When the fuel gauge IC is still mapped to the old cell's discharge curve, it reports 20–30% remaining while the actual cell voltage has already dropped below the BMS cutoff threshold. The BMS trips and the phone shuts off without warning. One complete discharge cycle — draining to auto-off and charging to 100% without interruption — lets the coulomb counter recalibrate and eliminates most false cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage, and if voltage drops below approximately 2.5V per cell the BMS enters lockout to prevent damage. The EL350 will show no signs of life — no charging indicator, no boot screen. Connect the phone to a wall charger rated at least 5V\/1A and leave it for 20–30 minutes without pressing the power button; the charge IC needs time to trickle current into the cell and bring voltage above the BMS re-enable threshold. Once the charging LED activates, the BMS has released lockout and normal charging can resume.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404343607386,"sku":"BWCS-MEL350XL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404343640154,"sku":"BWCS-MEL350XL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404343672922,"sku":"BWCS-MEL350XL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MEL350XL-1.webp?v=1779369806","url":"https:\/\/batteryweb.com\/products\/emporia-emporia-elson-el350-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}