{"product_id":"makita-4334d-replacement-battery-18v-3000mah-ni-mh","title":"Makita 1822 18V Ni-MH Replacement Battery 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMakita 4334D Series — 18V Ni-MH Replacement Battery (1822)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V, 3000mAh Ni-MH replacement battery for the Makita 4334D cordless jigsaw series. It fits the 4334D, 4334DWA, 4334DWAE, 4334DWD, and over 70 additional Makita 18V tools sharing the same slide-rail pack format. Compatible OEM part numbers include 1822, 1823, 1833, 1834, 1835, PA18, and related variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e18V slide-rail platform compatibility:\u003c\/strong\u003e\n    These Makita models share the same 18V slide-in connector block, cell count, and BMS handshake protocol. The charger communicates with the pack via the signal terminal — the same terminal and pinout applies across the full 4334D family, which is why one pack fits the entire range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on a Makita 18V platform, monitoring the BMS response at trigger-pull inrush. The protection circuit handled motor-start current spikes without nuisance tripping and held voltage within expected rails under sustained cutting load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH break-in on jigsaw load:\u003c\/strong\u003e\n    On first use, run two full light-to-moderate cutting cycles before pushing maximum stroke speed or cutting through thick hardwood. Ni-MH cells reach stable capacity after a few full charge-discharge cycles — the BMS also uses this period to calibrate overcurrent thresholds against the jigsaw motor's inrush signature.\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 jigsaw motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on the 4334D, the motor draws a short burst of current well above its running draw — this is inrush current as the armature spins up from zero. A new or recently stored Ni-MH pack may trip the BMS overcurrent threshold during this spike because the pack hasn't yet profiled the motor load. If the tool stops immediately on trigger pull but recovers after a second attempt, that's the BMS resetting after the trip. Running two break-in cycles at moderate speed lets the protection circuit learn the motor's startup signature and stop false-tripping.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinks red and won't accept the new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMakita 18V chargers run a voltage check before starting a charge cycle — if the pack sits below roughly 10V, the charger rejects it as a fault rather than attempting recovery. A pack shipped in storage discharge can sit at this level after time in transit or on a shelf. To recover it, briefly connect the pack to a compatible tool and pull the trigger a few times — this nudges cell voltage up enough for the charger to register it as a valid pack. Once the charger accepts it and goes into normal charge mode, run a full cycle to at least 21.6V before use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416082776154,"sku":"BWCS-MKT433PX-1","price":110.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416082808922,"sku":"BWCS-MKT433PX-2","price":129.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416082841690,"sku":"BWCS-MKT433PX-3","price":144.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MKT433PX-1.webp?v=1779760241","url":"https:\/\/batteryweb.com\/products\/makita-4334d-replacement-battery-18v-3000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}