{"product_id":"htc-desire-s-replacement-battery-37v-1500mah-li-ion","title":"HTC Desire S Replacement Battery 3.7V 1500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHTC Desire S \/ S510E — 3.7V Li-ion Replacement Battery (BA S530 \/ BG32100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion cell rated at 1500mAh (5.55Wh), built to fit the HTC Desire S, S510E, Saga, and PG88100 among other compatible handsets. It replaces OEM part numbers BA S530, BG32100, 35H00152-00M, BA S590, BH11100, and 35H00159-00M. Swap it in when the original cell no longer holds a useful charge or refuses to charge at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDesire S platform compatibility:\u003c\/strong\u003e\n    The S510E, Saga, and PG88100 all run the same 3.7V battery rail with an identical connector footprint and BMS handshake protocol. One cell covers the full platform because HTC kept the power architecture consistent across these variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the HTC Desire S charging circuit and confirmed the BMS negotiated charge termination correctly at full voltage. The protection circuit tripped as expected on a simulated over-discharge pull.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging 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 the system locks in percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Desire S reports the wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Desire S uses a fuel gauge IC that builds its charge model by learning a cell's voltage-versus-capacity curve over cycles. When you fit a new cell, the IC still references the old degraded curve stored in memory. This mismatch causes the percentage display to skip forward or backward by 10–20% until the IC relearns the new cell. One complete discharge down to automatic shutdown, followed by a full uninterrupted charge, resets the learned curve and brings the percentage readout back in line.\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 triggers a current spike that the fuel gauge IC hasn't yet correlated to a safe voltage threshold on the new cell. The cell voltage drops sharply under load, crosses the BMS protection floor, and the phone cuts out even though the displayed percentage looks safe. It is not a faulty battery — it is an uncalibrated gauge reading a healthy cell incorrectly. Run one full discharge-charge cycle and the shutdowns stop; the fuel gauge IC will have mapped the new cell's voltage cliff to the correct low-percentage cutoff point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405026295898,"sku":"BWCS-HTS510XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405026328666,"sku":"BWCS-HTS510XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405026361434,"sku":"BWCS-HTS510XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTS510XL-1.webp?v=1779369842","url":"https:\/\/batteryweb.com\/products\/htc-desire-s-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}