{"product_id":"casio-qt-6000-replacement-battery-36v-2000mah-ni-mh","title":"Casio QT-6000 Replacement Battery HHR-21H3G1B 3.6V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCasio QT-6000 \/ QT-6100 \/ QT-6200 \/ QT-6600 — 3.6V Ni-MH Replacement Battery (HHR-21H3G1B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 2000mAh Ni-MH battery replaces the OEM pack in the Casio QT-6000 series portable payment terminals. It fits the QT-6000, QT-6100, QT-6200, and QT-6600 models. All four share the same battery bay, connector pinout, and charge circuit — one part number covers the range.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQT-6000 series platform fit:\u003c\/strong\u003e\n    Casio built the QT-6000, QT-6100, QT-6200, and QT-6600 on a common chassis with an identical 3.6V battery rail and the same BMS handshake protocol. This replacement matches that voltage and connector geometry exactly — no adapters, no wiring changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the QT-6000's charge IC and verified the BMS accepted the new pack without fault codes. The charge controller completed its top-off phase normally and the terminal logged a full capacity reading after one complete boot-charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment tip for POS terminals:\u003c\/strong\u003e\n    After installation, run one complete transaction cycle — receipt print included — before putting the terminal into a live queue. The QT-6000 maps battery capacity during normal operation and won't display an accurate charge indicator until it has completed at least one full power cycle under real load.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal not completing PCI boot sequence after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe QT-6000 runs a PCI compliance check during every cold boot. On a freshly installed Ni-MH cell, the terminal's BMS handshake can time out if the cell voltage hasn't stabilised above the boot threshold — typically around 3.4V measured at the connector. This causes the boot sequence to halt before the payment application loads. Fully charge the new battery before the first power-on, then allow the terminal to complete one uninterrupted boot cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal won't power on after sitting unused in a drawer\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day at room temperature. A QT-6000 left unused for several months can see its cell drop below the BMS recovery threshold — around 3.0V — causing the terminal to appear completely dead. Connect the terminal to its dock or AC adapter and leave it on charge for a minimum of 4 hours before attempting to power on. If the charge LED doesn't activate within 10 minutes, check the dock contacts for corrosion and clean with isopropyl alcohol before retrying.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415926014042,"sku":"BWCS-CQT600SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415926046810,"sku":"BWCS-CQT600SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415926079578,"sku":"BWCS-CQT600SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CQT600SL-1.webp?v=1779757950","url":"https:\/\/batteryweb.com\/products\/casio-qt-6000-replacement-battery-36v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}