{"product_id":"schiller-at3-ekg-replacement-battery-96v-2000mah-ni-mh","title":"Schiller AT3 EKG 110072 Replacement Battery 9.6V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSchiller AT3 EKG — 9.6V Ni-MH Replacement Battery (110072)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 2000mAh Ni-MH replacement battery for the Schiller AT3 portable electrocardiograph. It replaces OEM part number 110072 and fits the AT3 EKG directly. The AT3 is a clinical-grade ECG device used in hospitals and outpatient settings for cardiac monitoring during patient examinations.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAT3 EKG platform fit:\u003c\/strong\u003e\n    The AT3 runs a 9.6V Ni-MH chemistry requirement tied to its BMS handshake and charge IC. Substituting a Li-ion pack at the same nominal voltage will trigger a continuous charge fault because the AT3's charge algorithm applies a delta-peak detection method specific to Ni-MH cells.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the AT3's charge circuit and monitored BMS response across startup, active ECG acquisition, and idle hold. The pack passed delta-peak cutoff cleanly and held stable voltage through the device's full self-test sequence without triggering a low-battery flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, let the AT3 complete its full power-on self-test without interrupting it. The device runs a BMS verification routine at boot — cutting power mid-sequence causes a false battery fault that persists until the next complete reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the AT3 EKG rejects a new battery during the startup self-test\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe AT3's BMS applies a capacity threshold check at startup that compares the cell's charge state against an expected baseline. A new Ni-MH cell that has not completed its first full charge-discharge cycle may fall short of that threshold — even if the charger reported a full charge. The BMS interprets this as a degraded or incorrect pack and flags a fault. Running one complete charge-discharge cycle before clinical use allows the BMS to establish an accurate baseline and pass the self-test reliably.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stops below 100% on first charge after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the AT3's charge IC applies a conservative current limit to an uncharacterised Ni-MH cell. Delta-peak detection on a fresh cell is less pronounced because the cell's internal resistance hasn't settled, so the IC terminates early to avoid overcharging an unknown pack. This is expected behaviour — the displayed percentage reflects the IC's conservative cutoff, not actual cell capacity. Charge the battery fully a second time immediately after; the IC recalibrates on the second cycle and the indicator reaches 100%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381434220634,"sku":"BWCS-SHC300MD-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381434253402,"sku":"BWCS-SHC300MD-2","price":57.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381434286170,"sku":"BWCS-SHC300MD-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHC300MD-1.webp?v=1778900788","url":"https:\/\/batteryweb.com\/products\/schiller-at3-ekg-replacement-battery-96v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}