{"product_id":"karcher-ef426-replacement-battery-252v-7500mah-li-ion","title":"Kärcher EF426 25.2V Replacement Battery BV 5\/1 Bp 7500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKarcher EF426 \/ BV 5\/1 Bp Series — 25.2V Li-ion Replacement Battery (6.654-183.0)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 25.2V, 7500mAh Li-ion replacement battery for the Karcher EF426, BV 5\/1 BP, T 9\/1 BP, and BR 30\/4 C BP cordless wet\/dry vacuum cleaners. It replaces OEM part numbers BV 5\/1 Bp, T 9\/1 Bp, 6.654-183.0, 6.654-255.0, and 6.654-284.0. Total energy capacity is 189Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEF426 \/ BV 5\/1 BP \/ T 9\/1 BP platform fit:\u003c\/strong\u003e\n    These models share a 25.2V battery rail, a common connector housing, and the same BMS handshake protocol — which is why one pack covers the full group. Swapping within this family does not require firmware changes or charger reconfiguration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge and discharge cycles on the EF426 platform. The BMS correctly flagged overcurrent during the motor-start inrush and recovered without tripping into fault lock. Cell balancing completed normally at the top of each charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush break-in on first use:\u003c\/strong\u003e\n    On the first two cycles, run the vacuum on standard suction only — avoid the maximum power mode. This lets the BMS log the motor's inrush current signature and set its overcurrent thresholds accurately before you push the motor hard.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS overcurrent trip on the EF426 motor-start surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EF426 motor draws a sharp inrush spike the instant the trigger engages — often two to three times the steady-state current. A new battery with a conservatively set BMS can interpret that spike as a fault and cut the output immediately. This is not a defective pack; it is the protection circuit reacting before it has learned the motor's start profile. Running two full cycles at reduced load allows the BMS to calibrate its overcurrent threshold against the actual motor behaviour. After that, full-power operation proceeds without nuisance trips.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger won't recognise the pack after it's been sitting unused\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that drop below approximately 2.5V per cell will fall outside the acceptance window of most Karcher chargers — the charger sees the low voltage as a damaged pack and refuses to begin a charge cycle. This happens when a battery sits unused for several months. To recover it, use a charger that has a conditioning or pre-charge mode, or briefly apply a trickle charge to bring the pack above 20V before placing it on the standard Karcher dock. Once the resting voltage reads above the acceptance threshold, normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416035033178,"sku":"BWCS-KEF426PX-1","price":180.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416035065946,"sku":"BWCS-KEF426PX-2","price":213.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416035098714,"sku":"BWCS-KEF426PX-3","price":238.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KEF426PX-1.webp?v=1779759609","url":"https:\/\/batteryweb.com\/products\/karcher-ef426-replacement-battery-252v-7500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}