{"product_id":"dejavoo-q3-replacement-battery-38v-3000mah-li-polymer","title":"Dejavoo Q3 Payment Terminal Replacement Battery WHB03-3000 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDejavoo Q3 \/ WIZARPOS Q3 — 3.8V Li-Polymer Replacement Battery (WHB03-3000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3000mAh lithium-polymer battery replaces the original WHB03-3000 cell in the Dejavoo Q3 and WIZARPOS Q3 mobile payment terminals. Both terminals run the same battery platform — same connector, same BMS handshake protocol, same form factor at 58.40 × 47.20 × 7.10mm. Swap in this cell and the terminal restores full power to its display, receipt printer, and wireless stack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQ3 and WIZARPOS Q3 platform compatibility:\u003c\/strong\u003e\n    Both devices share an identical battery bay, connector pinout, and BMS communication line. The WHB03-3000 part number covers both variants — no adapter or wiring change needed.\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 and receipt-print events on the Q3 platform. The BMS negotiated correctly on first power-on, with no overcurrent trips across repeated print-and-tap transaction sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment tip:\u003c\/strong\u003e\n    After installation, run one complete transaction cycle — including a receipt print — before putting the terminal into live service. The Q3 maps battery capacity during normal operation, and the charge indicator will read inaccurately until that first full charge-discharge cycle completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal rebooting mid-transaction after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Q3's receipt printer draws a sharp current spike the moment it fires — often 1.5A or more for under a second. On a new cell that has not yet completed a conditioning cycle, the BMS may read that spike as an overcurrent event and cut power to protect the cell. This trips the terminal mid-transaction, which looks like a random reboot but is actually a BMS protection event. Run two or three print cycles off-peak first, let the BMS log normal draw patterns, and the trips stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal not completing PCI boot sequence on first power-on\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Q3 runs a PCI-compliant boot check that includes a battery state read before the OS fully loads. A new cell that has not yet been through a charge cycle can present a state-of-charge reading the terminal flags as ambiguous, stalling the boot sequence at the splash screen. Connect the terminal to its charger, let it reach a full charge, then power on — the BMS handshake completes correctly once the cell registers above 4.1V on the charge IC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415921197146,"sku":"BWCS-DWZ300BL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415921229914,"sku":"BWCS-DWZ300BL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415921262682,"sku":"BWCS-DWZ300BL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DWZ300BL-1.webp?v=1779757951","url":"https:\/\/batteryweb.com\/products\/dejavoo-q3-replacement-battery-38v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}