{"product_id":"logisty-l3303-replacement-battery-72v-6500mah-li-socl2","title":"Logisty L3303 Replacement Battery 7.2V 6500mAh Li-SOCl2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLogisty L3303 \/ L3305 Series — 7.2V Li-SOCl2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V 6500mAh lithium thionyl chloride cell for Logisty alarm system control panels. It fits the L3303, L3305, L2303CH, and VOCALIS L3305 among a wider range of compatible panels. It restores backup power so the panel can maintain zones, memory, and siren output during mains failure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eL3303 \/ L3305 \/ L2303CH platform fit:\u003c\/strong\u003e\n    These panels share the same 7.2V backup rail, physical cell envelope (52.50 × 51.70 × 26.00mm), and connector orientation. The BMS on each model accepts the Li-SOCl2 chemistry natively — no firmware flag or adapter needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the L3305 panel under simulated mains-off conditions. The BMS accepted the cell without a fault code, float charge began within two minutes of connection, and the panel held zone programming throughout the test cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation float charge window:\u003c\/strong\u003e\n    Li-SOCl2 cells exit storage in a partially passivated state. Do not run a full zone or siren diagnostic test within the first 24 hours of installation. Allow the panel to trickle-charge the new cell for 24–48 hours first, or the panel may flag a low-battery condition against a cell that is actually sound.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlarm panel losing programming during a power outage after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed Li-SOCl2 cell takes 48 hours on float charge before the panel treats it as fully conditioned backup power. If mains power drops before that window closes, the panel may draw more current than the passivated cell can immediately deliver, causing a voltage dip that wipes volatile memory. The fix is to install the new cell, restore mains power, and let the panel sit undisturbed for 48 hours before cutting mains as a test. After that conditioning period the cell delivers its full 6500mAh reserve without the voltage sag that clears programming.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSiren not sounding on test after backup battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMost Logisty panels impose a 30–60 second siren-inhibit delay on startup when a new backup cell is detected, allowing charge stabilisation before the sounder circuit is armed. If a walk-test is triggered immediately after swap, the siren stays silent and the panel logs no fault — which looks like a wiring or sounder fault but is not. Wait at least 60 seconds after powering the panel back on, then re-run the test. If the siren still does not sound after that delay, check the sounder tamper loop voltage at the panel terminal — it should read above 6.8V with the new cell installed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43309817069658,"sku":"BWCS-BCT140BT-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43309817102426,"sku":"BWCS-BCT140BT-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43309817135194,"sku":"BWCS-BCT140BT-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BCT140BT-1.webp?v=1777868135","url":"https:\/\/batteryweb.com\/products\/logisty-l3303-replacement-battery-72v-6500mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}