{"product_id":"dejavoo-z9-v3-replacement-battery-37v-2900mah-li-polymer","title":"Dejavoo Z9 V3 Replacement Battery IP604355-2P 3.7V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDejavoo Z9 V3 \/ Z9 Blue — 3.7V Li-Polymer Replacement Battery (IP604355-2P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2900mAh lithium-polymer battery for the Dejavoo Z9 V3 and Z9 Blue payment terminals. It replaces OEM part IP604355-2P and fits directly into both units without modification. Capacity figure is taken from the product data: 2900mAh (10.73Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZ9 V3 and Z9 Blue compatibility:\u003c\/strong\u003e\n    Both terminals share the same battery bay dimensions, connector pinout, and BMS handshake protocol — which is why a single cell works across both. The Z9 Blue is a colour variant, not a hardware revision. Same voltage rail, same communication lines.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full boot sequences, receipt print bursts, and wireless transaction loads on the Z9 V3. The BMS accepted the handshake on first boot without error flags, and the charge IC entered top-off mode correctly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment tip:\u003c\/strong\u003e\n    After installation, complete one full transaction cycle before deploying in a live environment. The terminal maps battery capacity during normal use and needs at least one complete power cycle to calibrate the charge indicator correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Z9 V3 reboots mid-transaction after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the receipt printer fires, it draws a short current spike — sometimes enough to trip the BMS overcurrent threshold on a cell that hasn't completed its first full charge cycle. The BMS interprets the spike as a fault and cuts output momentarily, which the terminal reads as a power loss and reboots. Run the terminal through at least one complete charge before processing live transactions. Once the BMS has logged a full cycle, it adjusts its overcurrent trip window and the reboots stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal stuck on boot screen after sitting unused in a drawer\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge at roughly 2–3% per month. A terminal left unused for several months can drop below the BMS recovery threshold — typically around 2.5V per cell — at which point the BMS locks output to protect the cell. Plug into the charger and leave it connected for a minimum of 30 minutes before attempting to power on. If the terminal still won't boot, check that the charger output reads between 4.9V and 5.1V at the port before assuming the battery is at fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415930863706,"sku":"BWCS-CTA300SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415930896474,"sku":"BWCS-CTA300SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415930929242,"sku":"BWCS-CTA300SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CTA300SL-1.webp?v=1779758086","url":"https:\/\/batteryweb.com\/products\/dejavoo-z9-v3-replacement-battery-37v-2900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}