{"product_id":"aspel-ascard-replacement-battery-74v-2600mah-li-ion","title":"Aspel AsCard 7.4V Li-ion Replacement Battery 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAspel AsCard \/ M-Trace — 7.4V Li-ion Replacement Battery (INR18650-2S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2600mAh Li-ion battery for the Aspel AsCard portable diagnostic device and M-Trace electrocardiographs. It replaces the OEM INR18650-2S cell pack when the original degrades and the unit can no longer hold a charge through a full session. Capacity figures are taken directly from product data — 19.24Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAsCard and M-Trace compatibility:\u003c\/strong\u003e\n    Both devices share the same 7.4V two-cell series configuration and use the INR18650-2S cell format. The BMS handshake and connector pinout match across this Aspel platform, so one cell pack covers both units without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the AsCard platform. The BMS initialised correctly on first connection, reported state-of-charge accurately by the second cycle, and held voltage within the expected band under simulated diagnostic load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the device complete its full power-on self-test without interruption. Aspel medical devices run a BMS verification step at startup — cutting power during this sequence triggers a false battery fault flag that will persist until the next clean 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 AsCard reports a low-battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe AsCard's BMS stores a calibrated charge threshold based on the chemistry profile of the original OEM cell. A new replacement cell has a slightly different internal resistance signature on the first cycle, which the BMS reads as below threshold even when the cell is fully charged. Run one complete charge-to-discharge-to-charge cycle before clinical use. After that cycle, the BMS recalibrates and the alarm clears. No fault log entry persists once the cycle completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the pack voltage drops below approximately 6.0V — the BMS deep-discharge recovery threshold for a 7.4V two-cell pack — the protection circuit opens and blocks output entirely. The device appears completely dead, not just flat. Connect the battery to a compatible charger and leave it for at least 20–30 minutes before attempting to power on the AsCard. Most chargers apply a trickle recovery current below 3.0V per cell, which reopens the BMS circuit and restores normal operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381357379674,"sku":"BWCS-ADC100MD-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381357412442,"sku":"BWCS-ADC100MD-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381357445210,"sku":"BWCS-ADC100MD-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ADC100MD-1.webp?v=1778900199","url":"https:\/\/batteryweb.com\/products\/aspel-ascard-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}