{"product_id":"rover-s2-replacement-battery-72v-2100mah-ni-mh","title":"Rover S2 E-0101 Replacement Battery 7.2V 2100mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRover S2 Series — 7.2V Ni-MH Replacement Battery (E-0101)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.2V 2100mAh Ni-MH pack replaces the original battery in the Rover S2, S2 E, S2 8PSK, T2, and related surveying instruments. It matches the voltage rail and physical form factor of OEM part numbers E-0101, BAT-PACK-DS8, and BAT-PACK-DM16HD. Capacity is 2100mAh (15.12Wh) — the same as stock.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS2 series and T2 compatibility:\u003c\/strong\u003e\n    These models share the same 7.2V battery bay, connector pinout, and BMS handshake protocol. One pack covers the full lineup because the charge management circuit is common across this instrument family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the S2 charge and discharge routine. The BMS passed the instrument's battery validation check without fault codes, and voltage held steady through repeated sensor initialisation draws.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration step:\u003c\/strong\u003e\n    After installing, run a full calibration cycle through the instrument menu before field deployment. The S2 maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRover S2 shutting down mid-measurement with bars still showing on the display\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S2 display reads voltage thresholds set at the factory for a new cell's discharge curve. An aged or deeply cycled Ni-MH pack has a flatter discharge curve, so actual voltage can drop sharply under sensor load even when the indicator shows two or three bars. The instrument's under-voltage cutoff triggers before the display updates. Replacing the pack and running one full calibration cycle re-anchors the threshold map to the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack will not charge after the instrument sat unused in a case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge continuously during storage — at roughly 20–30% per month at room temperature. After several months in a carry case, terminal voltage can fall below the charger's detection threshold, and the instrument's charge circuit reads the pack as absent or faulty. Place the pack on a standalone Ni-MH charger that supports recovery mode and allow it to trickle charge at 0.1C until terminal voltage climbs above 7.0V. Once recovered, reinsert into the instrument and charge fully before use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360663208026,"sku":"BWCS-RDS200SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360663240794,"sku":"BWCS-RDS200SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360663273562,"sku":"BWCS-RDS200SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RDS200SL-1.webp?v=1778616161","url":"https:\/\/batteryweb.com\/products\/rover-s2-replacement-battery-72v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}