{"product_id":"pax-a920-max-replacement-battery-64v-2500mah-li-polymer","title":"Pax A920 MAX Replacement Battery 6.4V 2500mAh YW-026","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePax A920 MAX — 6.4V Li-Polymer Replacement Battery (YW-026)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6.4V 2500mAh lithium-polymer replacement battery for the Pax A920 MAX portable payment terminal. It fits the A920 MAX directly, using OEM part number YW-026. Capacity is sourced from the product specification — 16Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA920 MAX platform fit:\u003c\/strong\u003e\n    The A920 MAX runs a single battery bay with a specific connector and BMS handshake tied to the YW-026 cell profile. Swapping in a different cell voltage or capacity triggers a rejected-battery flag at the charge IC. This unit matches that profile exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle on an A920 MAX unit. The BMS accepted the handshake on first boot, charge IC entered CC\/CV mode normally, and the terminal completed its PCI boot sequence without a fault flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-deployment cycle on the A920 MAX:\u003c\/strong\u003e\n    After installation, complete one full transaction cycle before deploying in a live environment. The terminal maps battery capacity during normal operation and requires 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\"\u003eReceipt printer causing unexpected battery drain on the A920 MAX\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe A920 MAX thermal printer draws a sharp current spike each time it feeds paper — this is separate from the display and wireless draw running simultaneously. On a degraded cell, that spike can push the BMS into an overcurrent trip, cutting power mid-transaction. A fresh 2500mAh cell at full capacity handles this combined load without hitting the BMS threshold. If drain still seems high, check that the terminal firmware is current — some earlier builds had aggressive backlight settings that compound the printer draw.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal not completing PCI boot sequence after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe A920 MAX runs a PCI-mandated hardware integrity check at every boot. If the battery voltage is below approximately 6.0V when the terminal powers on, the boot sequence stalls before the OS loads — it looks like a dead unit. Charge the replacement battery to full before the first boot attempt. If the terminal still halts mid-sequence, hold the power button for 10 seconds to force a hard reset, then power on again with the charger connected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415919460442,"sku":"BWCS-PAX920BL-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415919493210,"sku":"BWCS-PAX920BL-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415919525978,"sku":"BWCS-PAX920BL-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PAX920BL-1.webp?v=1779757973","url":"https:\/\/batteryweb.com\/products\/pax-a920-max-replacement-battery-64v-2500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}