{"product_id":"siemens-vk20c01-replacement-battery-36v-3000mah-ni-mh","title":"3-VR1.8CS VC1 Siemens VK20C01 Replacement Battery 3.6V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSiemens VK20C01 — 3.6V Ni-MH Replacement Battery (3-VR1.8CS VC1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 3000mAh Ni-MH replacement battery for the Siemens VK20C01 cordless handheld vacuum cleaner. It replaces OEM part 3-VR1.8CS VC1 and restores suction power to vacuums where the original cell has degraded or failed. Dimensions are 64.80 x 43.00 x 31.30mm — confirm these against your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVK20C01 fit:\u003c\/strong\u003e\n    The VK20C01 runs a single 3.6V Ni-MH cell at this exact form factor. The connector and cell housing are sized to this replacement — any deviation in cell dimensions will prevent correct seating in the vacuum chassis.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and load discharge on the VK20C01 motor circuit. The cell held stable voltage under sustained motor draw and the BMS tripped correctly at low-voltage cutoff without false positives at mid-discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging behaviour on the VK20C01:\u003c\/strong\u003e\n    Do not leave the VK20C01 sitting on its charging dock after the cell reaches full charge. Continuous trickle current from the dock accelerates Ni-MH capacity fade. Charge fully, then remove from the dock and store the vacuum off-charge.\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 reads low on the VK20C01\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells in handheld vacuums show voltage sag under motor load well before the cell is technically depleted. On the VK20C01, a partially blocked filter increases motor draw, which amplifies this sag and makes suction fall off earlier in the charge cycle. The battery indicator reads voltage at rest — not under load — so it can still show mid-charge while suction is already weak. Clear the filter and check that airflow is unrestricted before concluding the cell is at fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVK20C01 motor cuts out during use and then recovers after a pause\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS overcurrent trip, not a dead cell. When suction is restricted — blocked nozzle, clogged filter, or hair wrap on the motor inlet — the motor draws more current than the BMS threshold allows, and the circuit interrupts to protect the cell. After a short pause, voltage recovers and the vacuum restarts. Fix the restriction first. If cut-outs continue with clear airflow, measure resting cell voltage — a healthy Ni-MH cell should read above 3.2V at rest after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426483077210,"sku":"BWCS-BHK300VX-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426483109978,"sku":"BWCS-BHK300VX-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426483142746,"sku":"BWCS-BHK300VX-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BHK300VX-1.webp?v=1779933418","url":"https:\/\/batteryweb.com\/products\/siemens-vk20c01-replacement-battery-36v-3000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}