{"product_id":"chc-x91-replacement-battery-74v-2000mah-li-ion","title":"CHC X91 GNSS Receiver Compatible Battery 7.4V 2000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCHC X91 \/ X93 \/ X900 GNSS Receiver — 7.4V Li-ion Replacement Battery (1906110059)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 2000mAh Li-ion pack replaces OEM part 1906110059 in CHC X91, X93, and X900 GNSS receivers. These are field survey instruments used in geodetic and construction work. Capacity is 14.8Wh — same as the original cell configuration.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX91, X93, and X900 compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay geometry, 7.4V nominal rail, and BMS handshake protocol. The connector pinout and cell voltage thresholds are identical across the series, so one pack covers all three.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the X91's power-up sequence and satellite acquisition load. The BMS held steady through the initial current draw at receiver boot and during active tracking. No cutoff events were logged under normal field load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration before field use:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the instrument's system menu before heading out. The X91 maps battery state during calibration — skipping this step causes the low-battery indicator to trigger early on the first field 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 X91 sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the pack drops below the BMS protection threshold — typically around 2.5V per cell — the BMS latches into a sleep state and the instrument won't power on at all. The receiver shows nothing, not even a low-battery warning. To recover, connect the pack to a charger that supports a pre-charge or trickle mode; a standard fast charger may refuse to start. Hold the pack on trickle until cell voltage climbs above 3.0V per cell, then switch to normal charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReadings drifting or logging session resetting mid-survey\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when sustained sensor and satellite-tracking load pulls cell voltage into a sag that the instrument interprets as a low-battery event, triggering a soft reset. It is not a full shutdown — the receiver reboots and the active logging session is lost. A degraded original pack masks this because its resting voltage looks fine but collapses under load. Swap to a fresh pack and confirm resting voltage reads at least 7.2V before starting a logging session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360796704858,"sku":"BWCS-LI1SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360796737626,"sku":"BWCS-LI1SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360796770394,"sku":"BWCS-LI1SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LI1SL-1.webp?v=1778616259","url":"https:\/\/batteryweb.com\/products\/chc-x91-replacement-battery-74v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}