{"product_id":"deviser-ds2100a-replacement-battery-111v-1700mah-li-ion","title":"Deviser DS2100A Replacement Battery 11.1V 1700mAh B09040066","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDeviser DS2100A \/ DS2100B \/ DS2100Q \/ DS2100L — 11.1V Li-ion Replacement Battery (B09040066)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the B09040066 lithium-ion battery for Deviser DS2100 series digital theodolites and total stations. It runs at 11.1V with a 1700mAh (18.87Wh) capacity. It fits the DS2100A, DS2100B, DS2100Q, and DS2100L variants — all four share the same battery bay, connector pinout, and BMS communication protocol.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDS2100 series compatibility:\u003c\/strong\u003e\n    The A, B, Q, and L variants of the DS2100 all use the same 11.1V three-cell configuration, the same physical form factor, and the same BMS handshake sequence. A battery that clears the handshake on one will clear it on all four.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the DS2100's power-on sequence, sensor initialisation, and a sustained angle-measurement logging session. The BMS held through the current spike at probe power-up and maintained stable voltage under continuous sensor load throughout logging.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration before field deployment:\u003c\/strong\u003e\n    After fitting this battery, run a full calibration cycle through the instrument menu before taking it to site. The DS2100 maps battery state during calibration — skipping this step causes the instrument to throw premature low-battery warnings on the first measurement session, even with a fully charged pack.\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 DS2100 sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge slowly during storage. If the DS2100 sat in a case for several months, the pack voltage may have dropped below the BMS recovery threshold — typically around 2.5V per cell, or roughly 7.5V total for a three-cell 11.1V pack. At that point the BMS enters a protective lockout and the instrument will not power on or show any charging activity. Connecting the charger for 15–30 minutes at a low trickle often recovers enough voltage for the BMS to re-initialise and accept a normal charge. If the pack does not respond after 45 minutes on the charger, the cells have dropped below the recovery floor and the pack needs replacing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDS2100 shuts down mid-measurement with no low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis typically happens when the instrument is running sustained horizontal or vertical angle logging with the display at full brightness — the combined sensor and display draw pulls the pack voltage below the BMS cutoff threshold momentarily, and the instrument cuts power to protect the cells. It is not a capacity failure; it is a voltage-sag event under load. Reduce display brightness one step in the instrument settings and check that the battery contacts in the bay are clean and making firm contact — corroded or loose contacts add resistance and amplify sag. If the shutdowns persist, check pack voltage under load with a multimeter: a healthy cell cluster should hold above 9.5V during active logging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360575291482,"sku":"BWCS-DRT210SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360575324250,"sku":"BWCS-DRT210SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360575357018,"sku":"BWCS-DRT210SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRT210SL-1.webp?v=1778615988","url":"https:\/\/batteryweb.com\/products\/deviser-ds2100a-replacement-battery-111v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}