{"product_id":"sky-vega-6-replacement-battery-37v-2700mah-li-ion","title":"Sky Vega 6 BAT-7400M Replacement Battery 3.7V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSky Vega 6 \/ IM-A860K — 3.7V Li-ion Replacement Battery (BAT-7400M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2700mAh Li-ion replacement battery for the Sky Vega 6 and Vega N6 smartphones, including IM-A860K and A860S 4G variants. It slots into the original battery bay and connects to the same four-pin flex contact. Capacity figure is sourced from product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVega 6 \/ N6 platform compatibility:\u003c\/strong\u003e\n    The IM-A860K and A860S 4G share the same 3.7V battery bay geometry and four-pin BMS contact layout. BAT-7400M covers the full range because the charge IC and protection circuit requirements are identical across these variants — same voltage rail, same connector pitch, same BMS handshake protocol.\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 the Vega 6 platform. The BMS accepted the charge IC handshake on the first cycle, protection thresholds triggered correctly at the low-voltage cutoff, and the coulomb counter tracked state-of-charge without prompting a fault flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current charge session pushes current into an uncalibrated state.\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 Vega 6 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different voltage-to-capacity curve than the aged cell the fuel gauge IC originally calibrated against. When the phone hits the modem transmission burst or screen-on peak draw, cell voltage can sag below the protection threshold even though the OS still shows 20–30% remaining. The BMS reads that voltage sag as a fault and shuts the phone down to protect the cell. One full discharge-charge cycle at standard rate allows the coulomb counter to resync against the new cell's actual curve, eliminating premature shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the BAT-7400M has dropped below approximately 2.5V per cell, the BMS enters lockout mode and will not pass current to the device — the phone appears completely dead. Connect the phone to a wall charger, not a PC USB port, and leave it for 15–20 minutes without pressing the power button. The charge IC delivers a low-current pre-charge trickle that brings the cell back above the BMS re-enable threshold, typically around 2.9V, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404323160154,"sku":"BWCS-PTA860XL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404323192922,"sku":"BWCS-PTA860XL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404323225690,"sku":"BWCS-PTA860XL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTA860XL-1.webp?v=1779369778","url":"https:\/\/batteryweb.com\/products\/sky-vega-6-replacement-battery-37v-2700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}