{"product_id":"szzt-ks8210-replacement-battery-74v-2000mah-li-ion","title":"Szzt KS8210 Replacement Battery 7.4V 2000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSzzt KS8210 — 7.4V Li-ion Replacement Battery (Q24384)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2000mAh Li-ion replacement battery for the Szzt KS8210 handheld payment terminal. It slots into the KS8210 and restores full operating power to the device. Capacity is 14.8Wh — matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKS8210 platform fit:\u003c\/strong\u003e\n    The KS8210 uses a dedicated battery bay with a fixed connector pinout tied to a BMS handshake that authenticates cell chemistry and voltage profile. This replacement carries the correct 7.4V nominal rating and cell configuration so the terminal's charge controller accepts it without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the KS8210's full boot sequence and ran simulated transaction loads — card reader, display, and thermal printer firing together. The BMS held steady through combined current draw without triggering overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-deployment calibration:\u003c\/strong\u003e\n    After installation, complete one full transaction cycle before putting the terminal into live service. The KS8210 maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator accurately.\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 KS8210's thermal printer draws a sharp current spike — typically 1.5A to 2A for about 200ms — every time it prints a receipt. On a new battery that hasn't completed its first charge-discharge cycle, the BMS may interpret that spike as an overcurrent event and cut output. This usually resolves after the first full charge cycle, which allows the BMS to set accurate current threshold baselines. If reboots persist beyond the second full charge, check that the battery contacts on the terminal are clean and making solid contact — oxidised pins increase resistance and amplify the voltage drop during printer-motor load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal won't power on after sitting unused in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 2–3% per month. A KS8210 left in a drawer for several months may have a battery that has dropped below the BMS recovery threshold — typically around 2.5V per cell, or approximately 5.0V total pack voltage. At that point the BMS locks output to protect the cells, and pressing the power button produces nothing. Connect the terminal to a charger and leave it for 30–45 minutes without pressing any buttons — the charge IC runs a trickle-charge recovery sequence that brings cell voltage back above the 5.0V unlock threshold before resuming normal charge rate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415919657050,"sku":"BWCS-KST821BL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415919689818,"sku":"BWCS-KST821BL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415919722586,"sku":"BWCS-KST821BL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KST821BL-1.webp?v=1779757951","url":"https:\/\/batteryweb.com\/products\/szzt-ks8210-replacement-battery-74v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}