{"product_id":"bamo-ier-mudline-tgs-replacement-battery-72v-2000mah-ni-mh","title":"BAMO IER MUDline TGS 7.2V Ni-MH Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBAMO IER MUDline TGS — 7.2V Ni-MH Replacement Battery (91508601)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 2000mAh Ni-MH battery pack for the IER MUDline TGS surveying instrument. It replaces OEM part 91508601 and fits directly into the MUDline TGS field unit. The MUDline TGS is a portable subsurface diagnostic instrument used in geological and mud-logging survey operations.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMUDline TGS platform fit:\u003c\/strong\u003e\n    The IER MUDline TGS runs a 7.2V nominal rail and uses a cell configuration that matches the 91508601 pack geometry — 50.90 × 40.00 × 39.00mm. The BMS handshake on this instrument reads cell count and voltage signature, so cell configuration and connector orientation must match exactly. This pack meets both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the MUDline TGS instrument's power-on sequence and sensor initialisation. The BMS handled the current spike at probe power-up without tripping into protection mode, and voltage held within the instrument's operating threshold under sustained sensor load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the instrument's menu before field deployment. The MUDline TGS maps battery state during calibration — skipping this step causes the low-battery indicator to trigger prematurely 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 cutoff when the probe module initialises on the MUDline TGS\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the MUDline TGS powers up its probe or sensor module, there is a sharp current spike at the moment the module draws its initialisation load. An aged or partially discharged Ni-MH pack can drop voltage briefly below the BMS protection threshold at that exact moment, causing the pack to cut out before the instrument finishes booting. This is not a connector fault — it is a cell-capacity issue. A fresh pack at full charge holds voltage above the cutoff floor and carries the probe initialisation spike cleanly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eInstrument shows inconsistent battery percentage on reboot after pack replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MUDline TGS uses a voltage-threshold method to estimate charge level — it does not have a coulomb counter. After fitting a new Ni-MH pack, the instrument's percentage display recalibrates to the new cell's open-circuit voltage curve over the first few charge-discharge cycles. Readings may jump or show a lower-than-actual percentage on early reboots. Run the calibration cycle through the instrument menu after fitting the new pack, then complete one full charge, and the displayed percentage will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360466174042,"sku":"BWCS-BMR860SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360466206810,"sku":"BWCS-BMR860SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360466239578,"sku":"BWCS-BMR860SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BMR860SL-1.webp?v=1778615882","url":"https:\/\/batteryweb.com\/products\/bamo-ier-mudline-tgs-replacement-battery-72v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}