{"product_id":"welch-allyn-protocol-propaq-lt-802ltrn-monitor-replacement-battery-84v-2600mah-li-ion","title":"Welch-Allyn 8.4V Protocol Propaq LT Replacement Battery 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWelch-Allyn Protocol Propaq LT 802LTRN Monitor — 8.4V Li-ion Replacement Battery (008-0857-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 8.4V, 2600mAh Li-ion battery for the Welch-Allyn Protocol Propaq LT portable patient monitor. It fits the 802LTRN, 802LTON, and PROPAQ-LT variants. Alternate OEM part numbers include 010-0230-03, 008-0873-00, and 008-0869-00.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePropaq LT 802-series platform:\u003c\/strong\u003e\n    These monitor variants share the same 8.4V power rail, battery bay connector, and BMS handshake protocol. A single cell spec covers the full platform because the charge IC and communication lines are identical across all listed models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Propaq LT charge and discharge sequence. The BMS completed voltage verification, accepted the charge profile without flagging a chemistry mismatch, and held steady voltage through a simulated multi-parameter monitoring load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test after installation:\u003c\/strong\u003e\n    Allow the device to complete its full startup self-test cycle without interruption after fitting this battery. The Propaq LT runs BMS verification at boot — 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\"\u003eLow battery alarm firing on the Propaq LT immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Propaq LT BMS stores an OEM chemistry baseline and checks incoming cells against it on first use. A new replacement cell hasn't yet built a charge history, so the BMS applies a conservative threshold and flags it short. This is not a fault with the battery. Run one complete charge-to-discharge cycle and the BMS recalibrates its threshold to match the actual cell capacity. After that first cycle, the alarm clears and the device reads charge level accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice fails to complete boot sequence after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell drops below approximately 6V, the Propaq LT BMS enters a protection state and blocks normal startup to prevent cell damage. The device won't boot — it won't even show a low battery warning. Connect the original charger and leave it for a minimum of two hours before attempting power-on. Once the cell climbs back above the BMS recovery threshold, the startup sequence completes normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381391589466,"sku":"BWCS-WBP802MD-1","price":143.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381391622234,"sku":"BWCS-WBP802MD-2","price":171.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381391655002,"sku":"BWCS-WBP802MD-3","price":191.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WBP802MD-1.webp?v=1778900511","url":"https:\/\/batteryweb.com\/products\/welch-allyn-protocol-propaq-lt-802ltrn-monitor-replacement-battery-84v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}