{"product_id":"myphone-halo2-replacement-battery-37v-1200mah-li-ion","title":"MyPhone BS-02 Halo2 Replacement Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMyPhone Halo2 — 3.7V Li-ion Replacement Battery (BS-02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-ion replacement battery for the MyPhone Halo2 and Halo 1075 smartphones. It fits the original BS-02 and BS-01 battery slots directly. Use the capacity figure from the product data — 1200mAh — when comparing against your original cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHalo2 \/ Halo 1075 compatibility:\u003c\/strong\u003e\n    Both the Halo2 and 1075 share the same 3.7V single-cell architecture and BS-series connector pinout. The charge IC on both models expects the same BMS handshake voltage, so one cell fits both without modification.\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 under modem-active and screen-on load conditions. The BMS held the cutoff voltage correctly and did not trip under the combined draw of calls and display at full brightness.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable any fast-charge mode and run one full discharge-charge cycle before normal use. 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 reference.\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 Halo2 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Halo2's fuel gauge IC stores a discharge curve from the old, degraded cell. When a fresh cell is fitted, the IC underestimates how much voltage remains at mid-range state of charge. Under modem or screen load, the phone sees the voltage drop briefly and interprets it as a depleted cell. One full discharge to automatic shutdown — then a full charge without interruption — overwrites the stored curve and stops the early cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eErratic percentage jumps — 45% dropping to 12% then back to 40% — mean the coulomb counter is recalibrating against a cell it has no reference data for. This is normal in the first one to two cycles on the Halo2 after a cell swap. Run the phone down to zero until it shuts itself off, then charge uninterrupted to 100%. After that cycle the percentage readings stabilise against the new cell's actual capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405046186074,"sku":"BWCS-OYB130SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405046218842,"sku":"BWCS-OYB130SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405046251610,"sku":"BWCS-OYB130SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OYB130SL-1.webp?v=1779369883","url":"https:\/\/batteryweb.com\/products\/myphone-halo2-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}