{"product_id":"wurth-h-28-ma-replacement-battery-28v-6000mah-li-ion","title":"Würth H 28-MA 28V Replacement Battery 6000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWurth H 28-MA Series — 28V Li-ion Replacement Battery (0700 956 730)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 28V 6000mAh (168Wh) Li-ion battery replaces the original pack on the Wurth H 28-MA, BS 28-A Combi, Master 28V, and Master H 28-MA cordless tools. It uses the same voltage rail and connector as the OEM pack. The BMS matches the communication protocol the Wurth charger expects, so the charger reads the pack as valid on insertion.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eH 28-MA and BS 28-A Combi compatibility:\u003c\/strong\u003e\n    These models share the same 28V rail, physical slide connector, and BMS handshake sequence. One battery pack crosses all four listed models without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated high-torque trigger pulls on a 28V platform. The BMS handled the motor-start inrush current without nuisance tripping and recovered cell voltage cleanly between draws.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush conditioning on first use:\u003c\/strong\u003e\n    On first use, run the tool at half load for two cycles before full-torque applications. This lets the BMS profile the motor's inrush current draw and set overcurrent thresholds accurately before you push the tool to maximum demand.\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 trigger-pull inrush surge in the H 28-MA\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe H 28-MA draws a sharp current spike the instant the motor starts — this inrush can be four to six times the running current. If the BMS overcurrent threshold is set low or the cells are cold, it reads that spike as a fault and cuts the output immediately. A new pack from storage may trip on the first hard pull because the BMS hasn't yet profiled the load. Two half-load warm-up cycles calibrate the threshold and stop nuisance cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool bogs and loses torque mid-cut under sustained load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the tool slows or bogs during extended drilling or driving rather than cutting out instantly, the cause is voltage sag under sustained draw — not a BMS trip. High contact resistance at the battery rail is the first thing to check: oxidised or dirty slide contacts limit current delivery and drop the voltage the motor actually sees. Clean the battery and tool contacts with isopropyl alcohol, then test. If sag continues with clean contacts, check that the pack is at or above 25V resting voltage before use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416024973402,"sku":"BWCS-MKV280PH-1","price":145.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416025006170,"sku":"BWCS-MKV280PH-2","price":171.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416025038938,"sku":"BWCS-MKV280PH-3","price":191.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MKV280PH-1.webp?v=1779759485","url":"https:\/\/batteryweb.com\/products\/wurth-h-28-ma-replacement-battery-28v-6000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}