{"product_id":"konka-kcmy-2901-t-replacement-battery-111v-2600mah-li-ion","title":"KONKA KCMY-2901-T Cordless Vacuum Replacement Battery 11.1V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKONKA KCMY-2901-T — 11.1V Li-ion Replacement Battery (ZL18650-B4-3S1P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 2600mAh Li-ion battery pack for the KONKA KCMY-2901-T cordless stick vacuum. It replaces the original ZL18650-B4-3S1P pack when the existing cell has degraded or no longer holds a usable charge. Voltage and cell configuration match the original motor drive circuit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKCMY-2901-T motor rail compatibility:\u003c\/strong\u003e\n    The KCMY-2901-T motor controller is tuned to an 11.1V nominal three-cell series pack. This replacement uses the same 3S1P cell arrangement, so the BMS communicates correctly with the vacuum's charge and discharge logic without modification.\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 and a sustained draw test that simulates the KCMY-2901-T motor under carpet load. The BMS held the discharge curve steady and triggered cutoff cleanly at the low-voltage threshold — no premature trip, no voltage sag under normal operating draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charge discipline on the KCMY-2901-T:\u003c\/strong\u003e\n    Do not leave this vacuum sitting on the charging dock indefinitely. The KCMY-2901-T dock delivers a continuous trickle once the pack is full, and Li-ion cells held at 100% state of charge under trickle current lose capacity significantly faster. Charge to full, then remove from the dock.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCordless vacuum losing suction before the battery indicator reaches low\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the motor is drawing more current than rated — usually because the filter is partially blocked. A restricted airflow path forces the motor to work harder, pulling the cell voltage down faster than a clean-filter run would. The BMS reads this elevated draw as a sign the pack is depleting and begins throttling output before the indicator catches up. Clean or replace the filter first, then retest — suction drop should shift back toward the end of the charge cycle where it belongs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cuts out mid-clean, then recovers after a short pause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a faulty battery. When suction is sustained against a blockage — debris caught at the nozzle, a clogged filter, or heavy carpet fibres — current spikes past the BMS protection threshold and the pack shuts the output circuit. After a brief cooldown, the BMS resets and the motor runs again. Clear the blockage, check the filter for buildup, and resume. If the trip repeats on a clear path, check that the replacement pack voltage reads at or above 10.8V under light load before assuming a cell fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426407186522,"sku":"BWCS-KCM290VX-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426407219290,"sku":"BWCS-KCM290VX-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426407252058,"sku":"BWCS-KCM290VX-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KCM290VX-1.webp?v=1779933072","url":"https:\/\/batteryweb.com\/products\/konka-kcmy-2901-t-replacement-battery-111v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}