{"product_id":"south-x11-data-controller-replacement-battery-74v-2600mah-li-ion","title":"South X11 Data Controller BP-5S Compatible Battery 7.4V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSouth X11 Data Controller — 7.4V Li-ion Replacement Battery (BP-5S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2600mAh Li-ion replacement for the South BP-5S battery pack. It fits the X11 Data Controller — a field surveying instrument used for data collection, positioning, and mapping work. Voltage, connector, and BMS communication match the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX11 Data Controller fit:\u003c\/strong\u003e\n    The X11 runs a 7.4V rail with a BMS handshake that checks cell voltage and pack ID at power-on. This replacement carries the correct two-cell Li-ion configuration and communicates cleanly with the X11's charge management circuit — no forced workarounds needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and discharge sequences on the X11 platform. The BMS reported no fault codes, accepted a standard CC\/CV charge profile, and held the voltage rail steady under sustained sensor and GPS logging load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration on the X11:\u003c\/strong\u003e\n    After installing this pack, run a full calibration cycle from the X11 instrument menu before heading to site. The instrument maps battery state during that sequence — skip it, and the low-battery warning will trigger early on your first measurement session even with a full charge.\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 X11 sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge slowly in storage. If the X11 sat unused long enough, the pack can drop below the BMS recovery threshold — typically around 2.5V per cell. At that point, the controller treats the pack as a fault condition and blocks normal charging. Most chargers will not attempt recovery automatically. Connect the pack to a Li-ion charger that supports a pre-charge or recovery mode, which applies a low current until cell voltage climbs above 3.0V per cell, then resumes normal charging.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eX11 shuts down mid-session during active GPS or data logging\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSustained GPS acquisition combined with active logging draws continuous current that a degraded or partially charged cell struggles to sustain. When cell voltage sags under that load, the BMS trips a low-voltage cutoff to protect the cells — the instrument shuts off even if the battery indicator showed capacity remaining. This is a voltage-sag cutoff, not a capacity failure. Charge the pack to full before field deployment and verify cell voltage reads above 8.0V at the X11 battery status screen before starting a long logging session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360514637914,"sku":"BWCS-TOX110SL-1","price":67.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360514670682,"sku":"BWCS-TOX110SL-2","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360514703450,"sku":"BWCS-TOX110SL-3","price":88.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOX110SL-1.webp?v=1778615963","url":"https:\/\/batteryweb.com\/products\/south-x11-data-controller-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}