{"product_id":"systronik-4-hxaal-replacement-battery-48v-2000mah-ni-mh","title":"Systronik 4-HXAAL Compatible Battery 4.8V 2000mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSystronik 4-HXAAL — 4.8V Ni-MH Replacement Battery (22996)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 2000mAh Ni-MH battery for the Systronik 4-HXAAL portable survey and test instrument. It replaces OEM part numbers 22996 and 91507801. Capacity matches original specification at 9.6Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4-HXAAL power rail:\u003c\/strong\u003e\n    The 4-HXAAL runs its sensor modules and display from a single 4.8V Ni-MH pack. The BMS monitors cell voltage across all four cells in series — one weak cell pulls the whole pack below cutoff threshold and the instrument shuts down even with remaining capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through probe initialisation draws and sustained logging loads. The BMS held cutoff thresholds correctly and cell balance stayed within spec across repeated charge-discharge cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration cycle:\u003c\/strong\u003e\n    After installing this pack, run a full calibration cycle through the instrument's menu before going into the field. The 4-HXAAL maps battery state during calibration. Skipping this step causes premature low-battery warnings on your first measurement session even when the pack is fully charged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout after the 4-HXAAL sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day at room temperature. After several months in storage, cell voltage can drop below the BMS recovery threshold — typically around 0.9V per cell on a 4-cell pack. When the instrument's BMS reads voltage below that floor, it refuses to accept a charge and the device shows no response on the charge indicator. Place the pack on a compatible charger that supports trickle or recovery mode to bring cell voltage back above 1.0V per cell before attempting a standard charge cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReadings drifting or resetting mid-session during sustained sensor logging\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUnder continuous sensor load, sustained current draw can cause voltage to sag across the pack, particularly as cells age or a new pack hasn't completed its first full calibration cycle. When pack voltage dips momentarily below the instrument's operating threshold, the 4-HXAAL resets its measurement session rather than shutting down cleanly — logs may appear incomplete or readings jump. Run the calibration cycle first, then confirm resting pack voltage sits above 5.0V before starting a long logging session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360466501722,"sku":"BWCS-SRK996SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360466534490,"sku":"BWCS-SRK996SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360466567258,"sku":"BWCS-SRK996SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SRK996SL-1.webp?v=1778615901","url":"https:\/\/batteryweb.com\/products\/systronik-4-hxaal-replacement-battery-48v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}