{"product_id":"spit-hdi-244-replacement-battery-12v-1500mah-ni-mh","title":"Spit HDI 244 Replacement Battery 12V 1500mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSpit HDI 244 \/ HDI 220 — 12V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 1500mAh Ni-MH replacement battery for the Spit HDI 244 and HDI 220 cordless hammer drills. It slots into both models, which share the same battery platform and connector format. Capacity is 1500mAh (18Wh), matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHDI 244 and HDI 220 platform fit:\u003c\/strong\u003e\n    Both drills run the same 12V battery rail and use the same slide-in connector and BMS handshake. One battery covers both tools without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through repeated motor-start cycles on the HDI 244. The BMS held stable through trigger-pull inrush spikes and did not trip at normal drill speeds. Cell temperatures stayed within safe limits across sustained driving sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBreak-in for inrush profiling:\u003c\/strong\u003e\n    On first use, run the drill at half load — light drilling or slow-speed fastening — for two full charge-discharge cycles before pushing maximum torque. This lets the BMS log the motor's inrush current signature and calibrate its overcurrent threshold accordingly, reducing nuisance cutoffs during heavy use later.\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 HDI 244 motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger hard on a fresh or storage-recovered Ni-MH pack, the motor draws a sharp current spike that can exceed the BMS overcurrent threshold before the drill reaches running speed. This is especially common if the pack has been sitting discharged — cell voltage is low, internal resistance is elevated, and the BMS is more sensitive to sudden load. The fix is to condition the pack with two lighter-load cycles first, as described in the break-in tip above. After that, the BMS threshold adjusts and normal trigger pulls stop tripping it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool bogs under load and loses torque mid-fastening\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the HDI 244 starts strong but loses speed or torque as the screw sinks, the usual cause is voltage sag from high contact resistance at the battery rail — not a dead cell. Check the slide contacts on both the battery and the drill body for oxidation or debris; even light surface corrosion adds enough resistance to drop the voltage rail under load. Clean the contacts with a dry cloth or fine emery paper and retest. If sag persists after cleaning, measure open-circuit voltage on a full charge — it should read at least 13.2V for a healthy 12V Ni-MH pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416085102682,"sku":"BWCS-BS3455PW-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416085135450,"sku":"BWCS-BS3455PW-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416085168218,"sku":"BWCS-BS3455PW-3","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BS3455PW-1.webp?v=1779760222","url":"https:\/\/batteryweb.com\/products\/spit-hdi-244-replacement-battery-12v-1500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}