{"product_id":"sharp-sh-06a-replacement-battery-37v-650mah-li-ion","title":"Sharp SH22 Replacement Battery 3.7V 650mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSharp SH-06A \/ SH-07A — 3.7V Li-ion Replacement Battery (SH22, ASH29242)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 650mAh (2.41Wh) Li-ion replacement battery for the Sharp SH-06A and SH-07A smartphones. It matches the original SH22 cell dimensions at 47.44 × 37.40 × 3.85mm and drops into the same battery bay without modification. Fit either model with the same part.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSH-06A and SH-07A compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers both. The fuel gauge IC on each device reads voltage and current from the same register addresses, so no firmware mismatch occurs.\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 an SH-series test unit. The BMS accepted the cell without triggering a fault flag, and the charge IC held the correct 4.2V cutoff at end of charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this battery, disable fast charging and run one complete discharge-charge cycle before returning to normal use. This gives the fuel gauge IC a clean discharge curve from the new cell to calibrate its coulomb counter against — skipping this step can cause the percentage readout to drift or report sudden low battery.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SH-06A reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SH-06A uses a fuel gauge IC that builds its capacity model from the previous cell's charge and discharge history. When a new cell goes in, that model is stale — the IC is predicting voltage curves it no longer sees. The result is a percentage reading that doesn't match actual remaining charge. One full discharge-to-shutdown followed by a full charge resets the coulomb counter against the new cell's actual curve. After that single cycle, the readout stabilises.\u003c\/p\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 modem or display draws a current spike and the cell voltage drops below the BMS cutoff threshold before the fuel gauge has time to update its register. The phone interprets this as a dead battery even though the gauge was showing 20–30%. It is more common in the first few cycles on a fresh cell, before the internal resistance settles and the fuel gauge IC has recalibrated. Run two full discharge-charge cycles and confirm the resting cell voltage reads at or above 3.7V before closing the phone back up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405066928218,"sku":"BWCS-SH220SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405066960986,"sku":"BWCS-SH220SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405066993754,"sku":"BWCS-SH220SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SH220SL-1.webp?v=1779369899","url":"https:\/\/batteryweb.com\/products\/sharp-sh-06a-replacement-battery-37v-650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}