{"product_id":"lenovo-et180-replacement-battery-37v-1500mah-li-ion","title":"Lenovo ET180 Replacement Battery 3.7V 1500mAh PE2021","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo ET180 — 3.7V Li-ion Replacement Battery (PE2021)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion battery for the Lenovo ET180 smartphone. It replaces OEM part number PE2021. Fit this cell when the original no longer holds a charge or the device shuts down unexpectedly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eET180 platform fit:\u003c\/strong\u003e\n    The ET180 uses a single-cell 3.7V Li-ion configuration with a matching connector and BMS communication line. The replacement cell matches the voltage rail and connector pinout so the charge IC and fuel gauge IC communicate correctly from the first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran full charge and discharge cycles on the ET180 with this cell installed. The BMS accepted the charge handshake without fault codes, and the fuel gauge IC tracked state-of-charge through a complete cycle without dropout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge recalibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging if available and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual 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 ET180 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ET180's fuel gauge IC stores a discharge curve calibrated to the original cell. A new cell with slightly different internal impedance hits a voltage cliff at a different state-of-charge than the old curve predicts. The OS reads 25% remaining, but the cell voltage drops below the modem's minimum rail under load and the phone cuts out. One full discharge-to-shutdown followed by a full uninterrupted charge resets the coulomb counter and eliminates the premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eET180 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 cell dropped below 2.5V, the BMS enters lockout mode to prevent damage and will not pass current to the device. Plug into a wall charger — not a USB port — and leave it connected for at least 30 minutes without pressing the power button. The charge IC trickle-charges the cell back above the BMS recovery threshold, typically 2.9V, after which the phone will power on normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405151961178,"sku":"BWCS-SP230SL-1","price":27.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405151993946,"sku":"BWCS-SP230SL-2","price":30.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405152026714,"sku":"BWCS-SP230SL-3","price":33.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SP230SL-big.webp?v=1779370298","url":"https:\/\/batteryweb.com\/products\/lenovo-et180-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}