{"product_id":"panasonic-ez571-replacement-battery-96v-2100mah-ni-mh","title":"Panasonic EY9180B 9.6V Ni-MH Cordless Drill Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic EZ571 \/ EY6282EQK Series — 9.6V Ni-MH Replacement Battery (EY9180B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 2100mAh Ni-MH replacement battery for the Panasonic EZ571 cordless drill\/driver and related models including the EY6282EQK, EYN595, and EY9184. It replaces OEM part numbers EY9180B and EY9180. Slot it in where the original pack failed — same voltage rail, same physical footprint.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEZ571 and EY6282EQK platform fit:\u003c\/strong\u003e\n    These models share the same 9.6V pack housing, contact layout, and thermal cutoff signalling. One battery covers the full group without adapter modifications or rewiring.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated load pulls on the EZ571 platform. The thermal cutoff tripped correctly under sustained stall conditions and reset cleanly after a two-minute cooldown — no latched fault states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH break-in on the EZ571:\u003c\/strong\u003e\n    Run the first two cycles at light to medium load before pushing full torque. Ni-MH cells reach stable capacity after a few charge-discharge cycles — skipping this step can leave the pack performing below its rated 2100mAh in early use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag on the EZ571 under sustained drilling load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells have higher internal resistance than Li-ion, so the 9.6V rail drops noticeably when the motor draws continuous current through dense material. On the EZ571, this shows up as the chuck slowing mid-hole rather than maintaining speed. Dirty or corroded pack contacts amplify the sag — resistance at the contact points compounds the cell's own internal resistance drop. Clean the contacts on both the pack and the tool's battery bay with a dry cloth before assuming the cells are at fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger not recognising this pack after extended storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs that sit unused for several months self-discharge below the voltage threshold some Panasonic chargers require to start a charge cycle. If the charger shows no activity or flashes an error immediately, the cells may have dropped below 1.0V per cell. A short manual trickle at around 100mA for 15–20 minutes using a compatible NiMH recovery charger can bring the pack voltage back above the acceptance threshold. Once the pack reaches roughly 9V total, re-insert it into the standard charger and it should begin a normal charge cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416064557146,"sku":"BWCS-PEZ918PW-1","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416064589914,"sku":"BWCS-PEZ918PW-2","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416064622682,"sku":"BWCS-PEZ918PW-3","price":93.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PEZ918PW-1.webp?v=1779760055","url":"https:\/\/batteryweb.com\/products\/panasonic-ez571-replacement-battery-96v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}