{"product_id":"philips-pagewriter-tc50-replacement-battery-108v-7800mah-li-ion","title":"Philips PageWriter TC50 ME202C 10.8V Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips PageWriter TC50 — 10.8V Li-ion Replacement Battery (ME202C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 10.8V, 7800mAh Li-ion battery replaces the ME202C cell in the Philips PageWriter TC50 portable 12-lead ECG machine. It fits the TC50 directly and matches the original voltage rail and connector. Capacity figures come from the product data — 84.24Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePageWriter TC50 platform fit:\u003c\/strong\u003e\n    The TC50 uses a dedicated battery bay with a BMS handshake that validates cell chemistry and voltage on every boot. This replacement cell meets the voltage and communication requirements that trigger a clean self-test result at startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the TC50's boot sequence and monitored the BMS handshake. The charge controller accepted the cell without fault codes, and the self-test completed cleanly on the second full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, let the TC50 complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this window logs a false battery fault that persists until the next full reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TC50 flags a battery fault after the first charge cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PageWriter TC50's charge IC applies a conservative current limit on cells it hasn't profiled yet. On the first charge, the controller may cap charge acceptance below the OEM threshold, triggering a fault flag even when the cell itself is healthy. This is a BMS learn-cycle behaviour, not a defective cell. Running one complete charge-to-discharge-to-full-recharge cycle lets the controller build an accurate capacity profile. After that cycle, the fault flag clears and the charge indicator reads correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stuck below 100% after first full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells have a slightly higher internal resistance than a broken-in cell. The TC50 charge IC reads this resistance and interprets it as reduced capacity, capping the reported state-of-charge at around 85–90% on the first charge. This is a measurement artefact, not an actual capacity shortfall. Complete one full discharge to the device's auto-shutoff point, then recharge to 100% — the charge IC recalibrates its resistance model and the indicator reaches full on the next cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381372223578,"sku":"BWCS-PHW500MD-1","price":238.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381372256346,"sku":"BWCS-PHW500MD-2","price":284.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381372289114,"sku":"BWCS-PHW500MD-3","price":318.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PHW500MD-1.webp?v=1778900449","url":"https:\/\/batteryweb.com\/products\/philips-pagewriter-tc50-replacement-battery-108v-7800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}