{"product_id":"philips-xenium-ctx588-replacement-battery-38v-4900mah-li-polymer","title":"Philips Xenium CTX588 Replacement Battery 3.8V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips Xenium CTX588 \/ X588 \/ S386 — 3.8V Li-Polymer Replacement Battery (AB5000BWMC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 4900mAh (18.62Wh) Li-Polymer cell replacing OEM part AB5000BWMC. It fits the Philips Xenium CTX588, X588, S386, and CTS386 smartphones. Install it when the original cell no longer holds a charge through a normal day of calls, messaging, and screen-on use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCTX588 \/ X588 \/ S386 \/ CTS386 platform fit:\u003c\/strong\u003e\n    These four models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The AB5000BWMC footprint — 81.00 × 64.30 × 5.30mm — seats correctly in all four without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge cycles through the Philips charge IC and confirmed the BMS communicates state-of-charge data correctly, accepting both standard and fast-charge current profiles without tripping a protection cutoff.\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 and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated register — preventing erratic percentage readings from the first day.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Xenium CTX588 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Philips Xenium fuel gauge IC stores a discharge curve built around the original cell's impedance and capacity profile. When a new cell goes in, that stored curve no longer matches the physical cell. The gauge reads voltage correctly but maps it to the wrong state-of-charge value. One full discharge down to auto-shutdown followed by a complete charge forces the coulomb counter to relearn the curve against the new 4900mAh cell.\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 phone's modem or display draws a high burst of current and the cell voltage sags below the BMS protection threshold faster than the gauge predicts. The gauge still reads 20–30% but the actual cell voltage under load has already dropped past the cutoff point. It is not a faulty battery — it is the fuel gauge IC running an uncalibrated curve against a fresh cell. Run two complete discharge-charge cycles and the reported percentage at shutdown will shift closer to 5–8%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391944786010,"sku":"BWCS-PHX588SL-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391944818778,"sku":"BWCS-PHX588SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391944851546,"sku":"BWCS-PHX588SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PHX588SL-1.webp?v=1779142678","url":"https:\/\/batteryweb.com\/products\/philips-xenium-ctx588-replacement-battery-38v-4900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}