{"product_id":"zebra-ql220-replacement-battery-74v-3400mah-li-ion","title":"Zebra QL220 Replacement Battery 7.4V 3400mAh AT16004-1","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZebra QL220 \/ QL320 Series — 7.4V Li-ion Replacement Battery (AT16004-1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 3400mAh Li-ion battery replaces the original AT16004-1 (also listed as H16004-LI) in the Zebra QL220, QL220+, QL320, and QL320+ mobile thermal printers. These printers are used for on-demand barcode label output in retail, logistics, and healthcare settings where the unit is carried or belt-mounted throughout a shift. Voltage and capacity match the original pack exactly — 7.4V, 3400mAh, 25.16Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQL220 and QL320 platform fit:\u003c\/strong\u003e\n    All four models in this series run the same 7.4V battery rail with the same connector and BMS handshake, so one pack covers the full QL220\/QL320 family. The BMS on each model reads cell voltage and temperature from the pack — the communication protocol is identical across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge cycles on a QL320+ and monitored BMS communication throughout. The protection circuit responded correctly to charge termination and discharge cutoff events — no false trips, no handshake failures with the printer's onboard firmware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-shift print burst tip:\u003c\/strong\u003e\n    The QL-series print head draws a sharp current spike on every label cut. Install this pack fully charged before the shift starts — a cell sitting at 20% when the print head fires its first burst can trigger a low-voltage BMS cutoff that looks like a dead battery, not a charge issue.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the QL220 stops mid-label on the first shift with a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe QL220 print head fires a resistive heating element across the full label width on every print pass. That draws a sharp, brief current spike — higher than the printer's standby draw by a significant margin. If the replacement pack ships partially discharged (which is standard for Li-ion transport safety), cell voltage can sag below the BMS cutoff threshold during that spike. The printer shuts off mid-label and shows a low-battery error even though the pack is not empty. A full charge before first use eliminates this — the cell impedance is lowest when the pack is near full, so the voltage sag under print-head load stays within the BMS operating window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrinter reports \"battery error\" immediately after installing the new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the BMS in the new pack has not completed its initialisation handshake with the printer's firmware. The QL-series communicates with the battery pack over a data line alongside the power contacts — if those contacts are dirty or not fully seated, the printer cannot read the pack's status registers and flags a fault. Wipe the battery contacts on both the pack and the printer bay with a dry cloth, reseat the pack firmly until the latch clicks, then power the printer on. If the error clears, place the unit on charge until the indicator shows full — a clean contact at 7.4V nominal resolves this in almost every case.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43324743909466,"sku":"BWCS-MZ320BX-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43324743942234,"sku":"BWCS-MZ320BX-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43324743975002,"sku":"BWCS-MZ320BX-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MZ320BX_1.webp?v=1778123056","url":"https:\/\/batteryweb.com\/products\/zebra-ql220-replacement-battery-74v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}