{"product_id":"skil-2566-replacement-battery-144v-3300mah-ni-mh","title":"Skil 144BAT 14.4V Ni-MH Replacement Battery 3300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSkil 2566 \/ 2565 \/ 2567 \/ 2568 Series — 14.4V Ni-MH Replacement Battery (144BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V Ni-MH replacement battery rated at 3300mAh, built to fit the Skil 2566 and related cordless drill\/driver models. It slots into the same battery bay as the original 144BAT pack and connects to the same four-contact rail. Fits the 2565, 2567, and 2568 platforms as well — all share the same 14.4V battery architecture.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2565 \/ 2566 \/ 2567 \/ 2568 platform compatibility:\u003c\/strong\u003e\n    These models run the same 14.4V battery bay, contact pitch, and BMS handshake. One pack covers the full lineup because Skil kept the electrical interface consistent across this drill\/driver generation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated trigger-pull loads on a 2566 chassis. The BMS held the overcurrent threshold through motor-start inrush without tripping, and cell voltage recovered cleanly between cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH break-in on the 2566:\u003c\/strong\u003e\n    Run the drill at half load for the first two charge-discharge cycles before pushing full torque. This lets the BMS profile the motor inrush draw and set accurate overcurrent thresholds before you hit maximum fastening loads.\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 motor-start inrush with the Skil 2566\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a cordless drill, current spikes sharply before the motor reaches speed — this inrush can hit three to five times the steady running draw. A freshly installed Ni-MH pack that hasn't been profiled yet may trip the BMS overcurrent protection at that spike. The pack shuts off instantly, which looks like a dead battery but isn't. Run two partial-load cycles first so the BMS learns where normal inrush sits, then full torque applications will clear without nuisance trips.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool bogs and loses torque under sustained load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eVoltage sag under load is the most common performance complaint on this platform. If the drill slows or loses torque mid-fastener, the first place to check is the contact rail — debris or oxidation on the battery terminals raises resistance and drops the voltage the motor actually sees. Clean both battery and tool contacts with a dry cloth, then check that the pack seats fully and the rail locks flush. A fully charged Ni-MH pack on this platform should hold above 13.0V under working load; if it drops below that immediately, the cells need a full charge cycle before assuming a fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416061018202,"sku":"BWCS-SHD144PX-1","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416061050970,"sku":"BWCS-SHD144PX-2","price":121.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416061083738,"sku":"BWCS-SHD144PX-3","price":134.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHD144PX-1.webp?v=1779760056","url":"https:\/\/batteryweb.com\/products\/skil-2566-replacement-battery-144v-3300mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}