{"product_id":"meditech-defi5s-plus-replacement-battery-15v-2800mah-li-mno2","title":"Meditech Defi5s Plus 15V Replacement Battery 59807129","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMeditech Defi5s Plus — 15V Li-MnO2 Replacement Battery (59807129)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15V, 2800mAh Li-MnO2 battery for the Meditech Defi5s Plus defibrillator. It replaces OEM part number 59807129. The Defi5s Plus is an automated external defibrillator used in emergency cardiac care and public access programs.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDefi5s Plus fitment:\u003c\/strong\u003e\n    This battery matches the voltage rail, connector configuration, and BMS communication protocol of the Defi5s Plus. The 15V nominal output is specific to this platform — do not substitute with lower-voltage cells, as the charge delivery circuit will not reach therapeutic output.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the Defi5s Plus charge cycle and confirmed the BMS handshake completed without fault codes. The protection circuit held within spec across the full charge-to-cutoff arc. No thermal anomalies were recorded.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the Defi5s Plus to complete its full power-on self-test without interruption. The device runs BMS verification at startup. Cutting power during this sequence triggers a false battery fault that persists until the next complete 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 Defi5s Plus flags a battery fault after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Defi5s Plus BMS compares cell impedance and resting voltage against thresholds set for the OEM Li-MnO2 cell. A new replacement cell can read outside those thresholds on the first cycle — not because the battery is faulty, but because the BMS has not yet completed its chemistry learn cycle. Running one full charge-to-discharge cycle resets the learned baseline. After that cycle, the fault should clear on the next power-on self-test.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDefi5s Plus will not power on after battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-MnO2 cells self-discharge slowly, but a battery stored below 12V can fall under the Defi5s Plus BMS recovery threshold. When that happens, the device does not attempt to power on at all — it looks like a dead unit. Connect the battery to a compatible charger and hold the charge for a full cycle before reinstalling. If the cell does not respond to charging within 30 minutes, check the charger output — it should be supplying at least 16.8V at the terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381355872346,"sku":"BWCS-MTD500MD-1","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381355905114,"sku":"BWCS-MTD500MD-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381355937882,"sku":"BWCS-MTD500MD-3","price":87.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTD500MD-1.webp?v=1778900214","url":"https:\/\/batteryweb.com\/products\/meditech-defi5s-plus-replacement-battery-15v-2800mah-li-mno2","provider":"BatteryWeb","version":"1.0","type":"link"}