{"product_id":"delfi-9-2100-portable-tourniquet-systems-replacement-battery-48v-2000mah-ni-mh","title":"Delfi 9-2100 Replacement Battery 4.8V 2000mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDelfi 9-2100 Portable Tourniquet Systems — 4.8V Ni-MH Replacement Battery (4-2100-17)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 2000mAh Ni-MH replacement battery for the Delfi 9-2100 Portable Tourniquet System. It matches OEM part number 4-2100-17 and restores power to the portable unit used for limb exsanguination in surgical settings. Voltage, capacity, and connector format match the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e9-2100 platform fit:\u003c\/strong\u003e\n    The 9-2100 system uses a fixed 4.8V Ni-MH cell pack with a BMS that handshakes specifically to this chemistry. Swapping chemistry type — even at matched voltage — will trigger persistent fault states the device cannot clear without a full reboot sequence.\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 load on the 9-2100 platform. The BMS accepted the cell without a fault flag, completed the self-test sequence, and the charge indicator tracked normally through to completion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After installing this battery, allow the device to complete its full power-on self-test cycle without interruption. The 9-2100 runs BMS verification at startup — cutting power during this window causes 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\"\u003eSelf-test failure after battery swap on the 9-2100\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 9-2100 runs a BMS learn cycle when a new cell is first installed. On the first startup, the device may flag a self-test failure because the BMS has not yet established a charge baseline for the new pack. This is not a defective battery — it is the device comparing cell behaviour against stored OEM reference data. Run one full charge-discharge cycle before clinical use. After that cycle, the BMS updates its reference values and self-test clears on subsequent boots.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggers immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 9-2100 alarm threshold is calibrated to the internal resistance profile of a conditioned OEM cell. A new Ni-MH pack has higher internal resistance before the first few cycles, which the BMS reads as a low-state-of-charge signal even when the cell is fully charged. The alarm is not indicating a bad battery — it is reacting to resistance, not actual capacity. Complete one full charge-discharge cycle; internal resistance drops as the cell conditions, and the alarm threshold is met at 4.8V under normal load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381508997210,"sku":"BWCS-DPL921MD-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381509029978,"sku":"BWCS-DPL921MD-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381509062746,"sku":"BWCS-DPL921MD-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DPL921MD-1.webp?v=1778901304","url":"https:\/\/batteryweb.com\/products\/delfi-9-2100-portable-tourniquet-systems-replacement-battery-48v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}