{"product_id":"owon-hds-n-oscilloscope-replacement-battery-74v-3200mah-li-polymer","title":"OWON HDS1021BAT 7.4V Replacement Battery for HDS-N Oscilloscope","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOwon HDS-N Series — 7.4V Li-Polymer Replacement Battery (HDS1021BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 3200mAh Li-Polymer pack replaces the OEM HDS1021BAT in the Owon HDS-N handheld digital oscilloscope and HDS1021M. It slots into the instrument's battery bay and communicates with the on-board BMS using the same voltage rails and connector pinout as the original cell. Capacity is 3200mAh (23.68Wh) — match the product data, not third-party listings that vary.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHDS-N and HDS1021M compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions (80.85 × 76.60 × 18.00mm), identical 7.4V nominal rail, and the same BMS handshake protocol. That common platform is why one pack covers both instruments without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the HDS-N's probe initialisation sequence, which draws a short current spike as the probe power rail energises. The BMS handled the spike without tripping into protection mode, and the instrument reported cell state correctly through all test phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the HDS-N:\u003c\/strong\u003e\n    Run a full calibration cycle through the instrument menu immediately after installing this pack. The HDS-N maps battery state-of-charge during calibration. Skip this step and the low-battery warning fires early on the first measurement session, even when the pack is well 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 HDS-N sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly in storage. If the pack drops below roughly 2.5V per cell during a long idle period, the BMS enters a deep-discharge lockout state and the instrument will not power on — even on charge. The fix is to connect the charger and leave it for 30–60 minutes before attempting to power the oscilloscope. Most BMS circuits include a trickle-recovery path that slowly raises cell voltage back above the re-initialisation threshold before allowing normal charge current to flow. Once the instrument boots and holds charge, run the calibration cycle to resync the fuel gauge to the recovered pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHDS-N shuts down mid-measurement with the battery indicator still showing charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when sustained probe load pulls the pack voltage low enough to trigger the BMS undervoltage cutoff, even though the on-screen indicator hasn't caught up yet. The indicator reads a resting voltage snapshot; under load, actual cell voltage sags faster than the display refreshes. It is more common with aged cells, but a new pack showing this symptom usually points to a calibration mismatch rather than a cell fault. Run the instrument's calibration routine, then confirm the resting pack voltage reads at or above 7.4V before the next session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360618741850,"sku":"BWCS-WSN506SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360618774618,"sku":"BWCS-WSN506SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360618807386,"sku":"BWCS-WSN506SL-3","price":50.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WSN506SL-1.webp?v=1778616135","url":"https:\/\/batteryweb.com\/products\/owon-hds-n-oscilloscope-replacement-battery-74v-3200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}