{"product_id":"highscreen-zera-f-replacement-battery-37v-1600mah-li-ion","title":"Highscreen Zera F Replacement Battery 3.7V 1600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHighscreen Zera F — 3.7V Li-ion Replacement Battery (Zera F)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1600mAh Li-ion battery for the Highscreen Zera F smartphone. It replaces the original cell when the existing battery degrades, swells, or can no longer hold a usable charge. Capacity is 5.92Wh, matching the stock specification for this handset.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZera F platform fit:\u003c\/strong\u003e\n    The Zera F uses a compact 62.20 × 46.20 × 5.30 mm cell footprint with a fixed connector orientation. This replacement matches that footprint exactly, so the connector seats without forcing and the battery cover closes flush.\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 a Zera F unit. The BMS accepted the charge handshake without fault codes, and voltage held stable across screen-on and modem-active load phases.\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 for one complete discharge-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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff under modem or display load that the gauge didn't predict, so the phone cuts power before the reported percentage reaches zero. It is not a faulty battery — it is a calibration mismatch. Run one full discharge to automatic shutdown, then charge uninterrupted to 100% to let the coulomb counter reset against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If this battery sat long enough, the BMS may have tripped into lockout below 2.5V per cell to prevent damage. The phone will show nothing — no charging animation, no response. Connect the phone to a wall charger, not a PC port, and leave it for 20–30 minutes before attempting to power on. A wall charger supplies enough current to push the BMS out of lockout and begin a recovery charge cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392064553050,"sku":"BWCS-HAF100SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392064585818,"sku":"BWCS-HAF100SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392064618586,"sku":"BWCS-HAF100SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HAF100SL-1.webp?v=1779143561","url":"https:\/\/batteryweb.com\/products\/highscreen-zera-f-replacement-battery-37v-1600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}