{"product_id":"philips-pagewriter-tc20-replacement-battery-108v-7800mah-li-ion","title":"Philips ME202C PageWriter TC20 Replacement Battery 10.8V 7800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips PageWriter TC20 \/ TC30 — 10.8V Li-ion Replacement Battery (ME202C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 7800mAh Li-ion battery that replaces the ME202C in the Philips PageWriter TC20 and TC30 series cardiographs. These are portable 12-channel ECG devices used in clinical, ward, and mobile medical unit settings. Voltage and capacity match OEM spec to keep the device's BMS from flagging a fault on first boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTC20 and TC30 platform compatibility:\u003c\/strong\u003e\n    Both the PageWriter TC20 and TC30 Cardiograph share the ME202C battery format, the same 10.8V nominal rail, and the same BMS communication protocol. Swapping between units in a facility using a mixed fleet is straightforward — the cell and connector are identical across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the PageWriter's full charge and discharge sequence. The BMS accepted the cell without fault, charge IC reached full termination voltage, and the device completed its power-on self-test without triggering a battery alarm.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the PageWriter complete its full power-on self-test without interrupting it. Medical-grade BMS firmware runs a verification sweep at startup. Cutting power during that sequence causes a persistent battery fault flag that won't clear until the next uninterrupted cold boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PageWriter TC20 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe TC20's BMS sets its low-battery alarm threshold against a learned capacity profile from the previous cell. A new ME202C hasn't completed a full charge-discharge learn cycle, so the BMS is comparing real-time voltage curves against a profile it built from an aged cell. On the first cycle, the new cell's voltage curve looks unfamiliar, and the firmware trips the alarm early. Run one full charge-to-discharge-to-charge cycle before relying on the battery indicator in a clinical setting. After that first cycle, the BMS recalibrates its profile to match the new cell and alarm thresholds normalise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePageWriter TC30 won't power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if the ME202C drops below approximately 2.5V per cell (around 7.5V pack voltage), the BMS latches into deep-discharge protection and blocks output entirely. The device shows nothing — no boot screen, no charge indicator. To recover, connect the OEM Philips charger and leave it for at least 30 to 60 minutes without pressing the power button. The charge IC applies a low-rate pre-charge current to bring the pack above the BMS recovery threshold, typically around 9V, before it unlocks normal charging. Once the indicator shows active charging, the battery is out of protection mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381372354650,"sku":"BWCS-PHW230MD-1","price":238.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381372387418,"sku":"BWCS-PHW230MD-2","price":284.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381372420186,"sku":"BWCS-PHW230MD-3","price":318.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PHW230MD-1.webp?v=1778900449","url":"https:\/\/batteryweb.com\/products\/philips-pagewriter-tc20-replacement-battery-108v-7800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}