{"product_id":"franklin-celltron-ultra-replacement-battery-96v-2000mah-ni-mh","title":"Franklin Celltron Ultra Replacement Battery 9.6V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFranklin Celltron Ultra \/ Grid C090 Ultra — 9.6V Ni-MH Replacement Battery (125-0036)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 2000mAh Ni-MH replacement battery for the Franklin Celltron Ultra and Grid C090 Ultra professional surveying and testing instruments. It matches OEM part numbers 125-0036 and 125-0036 REV C. Voltage and cell count are identical to the original pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCelltron Ultra and Grid C090 Ultra compatibility:\u003c\/strong\u003e\n    Both instruments share the same 9.6V eight-cell NiMH architecture and connector pinout. The battery management handshake uses the same thermal cutoff line, so one pack covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the Celltron Ultra's instrument-side charge controller and confirmed the thermistor line communicates correctly at all three charge stages. The BMS held cutoff at the correct peak-delta-V threshold across repeated cycles.\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 sequence through the instrument menu before field deployment. The Celltron Ultra maps battery state during calibration — skipping this step causes the low-battery warning to trigger early on the 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 instrument sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH cells self-discharge at roughly 1–2% per day at room temperature. After several months in storage, the pack voltage can drop below the BMS recovery threshold — typically around 7.2V on a 9.6V pack — and the protection circuit latches off. The instrument either shows nothing on power-up or briefly flickers and shuts down. To recover, connect the pack to a NiMH-capable charger that supports a trickle pre-charge mode; this brings cell voltage up slowly until the BMS re-initialises, usually within 20–40 minutes of trickle current at 0.1C.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCelltron Ultra shutting down the moment a probe or sensor module initialises\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eProbe modules draw a short current spike at power-up as their internal circuits initialise — on the Celltron Ultra this can briefly exceed the BMS overcurrent threshold on a partially discharged or cold pack. The BMS interprets this spike as a fault and cuts output, even though the battery itself has adequate charge remaining. Cold temperatures make this worse because NiMH internal resistance rises sharply below 10°C. Bring the instrument to room temperature before powering on, and ensure the pack is above 9.0V before connecting an external probe module.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360505954394,"sku":"BWCS-FRK036SL-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360505987162,"sku":"BWCS-FRK036SL-2","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360506019930,"sku":"BWCS-FRK036SL-3","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FRK036SL-1.webp?v=1778615946","url":"https:\/\/batteryweb.com\/products\/franklin-celltron-ultra-replacement-battery-96v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}