{"product_id":"schwing-betonpumpe-ak2-replacement-battery-72v-2000mah-ni-mh","title":"Schwing Betonpumpe AK2 Replacement Battery 7.2V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSchwing Betonpumpe AK2 — 7.2V Ni-MH Replacement Battery (491001057)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.2V 2000mAh Ni-MH battery replaces OEM part 491001057 in the Schwing Betonpumpe AK2 concrete pump wireless remote. It fits the handheld transmitter operators use to control pumping functions from a safe distance on active construction sites. Voltage and cell count match the original pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBetonpumpe AK2 remote compatibility:\u003c\/strong\u003e\n    The AK2 transmitter runs a 6-cell Ni-MH arrangement at 7.2V nominal. That voltage rail drives the RF module and solenoid-trigger logic simultaneously. Any deviation in cell count or voltage class causes the remote to fail pairing or drop commands mid-operation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through solenoid-activation sequences and monitored the BMS response under inrush loads. Voltage held within spec across repeated trigger events, and the protection circuit did not trip during normal command bursts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge before field deployment:\u003c\/strong\u003e\n    Ni-MH packs ship at partial storage charge — typically 40–60% of rated capacity. On an AK2 remote, a partially charged cell cluster will read low-battery within minutes of first use. Charge the pack fully before taking the remote to site.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSolenoid activation causing power dropout on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the AK2 remote triggers a solenoid or relay command, the transmitter draws a short inrush current spike — noticeably higher than idle draw. A Ni-MH pack that has been sitting discharged for weeks has elevated internal resistance, even if it shows some voltage on a meter. That resistance causes a voltage sag under the inrush load, which the remote's under-voltage detection interprets as a dead battery and shuts down. Fully charging the pack before use brings internal resistance back down and eliminates the dropout.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote showing low-battery immediately after a new pack is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh replacement pack at storage voltage — around 1.0–1.1V per cell — will read low on the AK2's battery indicator the moment the remote powers on. This is not a faulty battery. The remote's fuel-gauge circuit reads resting voltage, and a Ni-MH cell below 1.2V per cell registers as depleted. Connect the pack to a Ni-MH compatible charger and bring it to full charge before assuming the battery is defective. After a full charge cycle, resting voltage should sit at approximately 1.4V per cell, and the low-battery warning will clear.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360055525466,"sku":"BWCS-TAK200BL-1","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360055558234,"sku":"BWCS-TAK200BL-2","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360055591002,"sku":"BWCS-TAK200BL-3","price":61.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TAK200BL-1.webp?v=1778610770","url":"https:\/\/batteryweb.com\/products\/schwing-betonpumpe-ak2-replacement-battery-72v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}