{"product_id":"lg-a902rm-replacement-battery-2555v-3500mah-li-ion","title":"LG A902RM Cord Zero Replacement Battery 25.55V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG Cord Zero A9 Series — 25.55V Li-ion Replacement Battery (MEV65921201)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 25.55V, 3500mAh Li-ion battery replaces the original pack in the LG Cord Zero A9 series cordless stick vacuums, including the A902RM, A929KVM, and A9M. It matches the OEM voltage rail and connector for the A9 platform. Capacity is 3500mAh (89.43Wh) as specified in the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA9 platform compatibility:\u003c\/strong\u003e\n    The A902RM, A929KVM, and A9M share the same 25.55V battery architecture, connector pinout, and BMS handshake protocol. A single cell format covers all three because LG standardised the power pack across this generation of Cord Zero vacuums.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the A9 platform. The BMS communicated correctly with the vacuum's charge management circuit, and no overcurrent trips occurred during motor start-up or sustained suction load on carpet.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging behaviour on the A9:\u003c\/strong\u003e\n    Remove the vacuum from the charging dock once the indicator shows full. The A9 dock does not cut trickle current cleanly, and cells left on continuous dock charge lose measurable capacity within a few months. Charge only when depleted, then disconnect.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSuction dropping before the battery indicator reaches low\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the motor draws more current than the BMS expects — usually caused by a partially blocked filter or brush roll restriction, not a failing battery. The BMS reads the voltage sag from that elevated draw as a low-charge condition and throttles motor power early. Clean the filter and check the brush roll for hair wrap before replacing the battery. A clear airpath keeps motor current inside the BMS's rated window and restores full suction.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMotor cuts out mid-clean and restarts after a few seconds\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a dead battery. Sustained restricted airflow — blocked filter, full dustbin, or tangled brush — pushes motor draw past the pack's overcurrent threshold. The BMS disconnects the output to protect the cells, then resets after a brief cooldown. Clear the filter and empty the bin first. If the cutout persists on an unobstructed vacuum, check that pack voltage reads at least 24V under load with a multimeter at the terminal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426435334234,"sku":"BWCS-LVA910VX-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426435367002,"sku":"BWCS-LVA910VX-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426435399770,"sku":"BWCS-LVA910VX-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVA910VX-1.webp?v=1779933315","url":"https:\/\/batteryweb.com\/products\/lg-a902rm-replacement-battery-2555v-3500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}