{"product_id":"birchmeier-rec-15-ac1-replacement-battery-18v-2000mah-li-ion","title":"Birchmeier REC 15 AC1 Compatible Battery 18V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBirchmeier REC 15 AC1 Series — 18V Li-ion Replacement Battery (12070301)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 18V, 2000mAh Li-ion battery replaces OEM part numbers 12070301, 12070401, and 12070501 in the Birchmeier REC 15 and REX 15 series cordless sprayers. It fits the REC 15 AC1, REC 15 AC2, REC 15 PC1, and REX 15 AC1 among others. Capacity is 36Wh — matching the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eREC 15 and REX 15 platform fit:\u003c\/strong\u003e\n    These models share the same 18V battery bay, connector pinout, and BMS handshake protocol — which is why a single battery covers the full range. The pump motor draws consistent current across all variants, so the same overcurrent thresholds apply.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated pump starts on the REC 15 platform and confirmed the BMS handled motor-start inrush current without nuisance tripping. Cell voltage under continuous pump load held stable above the BMS low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSprayer pump break-in:\u003c\/strong\u003e\n    On first use, run the sprayer at partial spray volume for the first two cycles before sustained full-pressure operation. This lets the BMS profile the pump motor's inrush current draw and set overcurrent protection thresholds accurately before heavy use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff on pump motor start inrush in the REC 15\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe REC 15 pump motor pulls a short inrush spike the moment the trigger is pressed to start flow. If the battery BMS has not yet profiled this load — common on a new or freshly charged pack after storage — it may interpret that spike as an overcurrent fault and cut power instantly. The fix is a slow first-use cycle at reduced spray pressure. After two normal cycles, the BMS learns the motor's start signature and stops tripping on it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger not recognising the pack after it sat unused\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that sit uncharged for several months can drop below the voltage threshold a standard charger needs to begin a charge cycle — typically around 2.5V per cell. The charger sees the pack as defective and refuses to engage. To recover, briefly connect the battery to a compatible charger and apply a short manual boost at low current to bring cells above the acceptance threshold, then switch to normal charging. If cell voltage is confirmed above 2.5V per cell after boost but the charger still rejects the pack, the BMS may require a reset by fully disconnecting and reconnecting the pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416015634522,"sku":"BWCS-MTB180VX-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416015667290,"sku":"BWCS-MTB180VX-2","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416015700058,"sku":"BWCS-MTB180VX-3","price":102.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTB180VX-1.webp?v=1779759486","url":"https:\/\/batteryweb.com\/products\/birchmeier-rec-15-ac1-replacement-battery-18v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}