{"product_id":"tristartester-smp-tt2-replacement-battery-37v-400mah-li-polymer","title":"Tristartester SMP-TT2 Replacement Battery 3.7V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTristartester SMP-TT2 Series — 3.7V Li-Polymer Replacement Battery (17508)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 400mAh Li-Polymer cell replaces part number 17508 in the Tristartester SMP-TT2, V1, V2, and V3 portable test and measurement instruments. These units are used in field diagnostics and survey operations where a failing battery interrupts data collection mid-session. Dimensions are 43.20 × 20.10 × 5.70mm — verify against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSMP-TT2, V1, V2, V3 compatibility:\u003c\/strong\u003e\n    All four variants share the same battery bay geometry, connector pinout, and BMS handshake protocol, which is why a single cell covers the entire platform. Voltage regulation across the series is identical at 3.7V nominal.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the SMP-TT2 power management circuit, confirmed BMS communication on startup, and verified the instrument accepted charge termination without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCalibration cycle after installation:\u003c\/strong\u003e\n    After fitting this battery, run a full calibration cycle through the instrument menu before taking it into the field. The SMP-TT2 maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement session.\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 SMP-TT2 sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge slowly in storage. If the SMP-TT2 sat unused for several months, the cell voltage may have dropped below the BMS protection threshold — typically around 2.5V. At that point the BMS opens the discharge circuit and the instrument will not power on even when connected to a charger. A replacement pack resolves this because the new cell ships above recovery voltage. If the original pack is the one you are replacing, connect the new cell and allow the instrument to sit on charge for at least 30 minutes before attempting to power on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReadings drifting or resetting mid-logging session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSustained sensor load draws continuous current from a small 400mAh cell, and a degraded pack will show voltage sag under that load even if the display showed adequate charge at startup. When cell voltage dips momentarily below the instrument's operating floor, the firmware can reset the active logging session or produce erratic readings without fully powering off. This is not a firmware fault — it is a voltage dropout event. A fresh cell holding stable voltage at 3.7V nominal eliminates the sag that triggers it.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306863525978,"sku":"BWCS-TTV100SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306863558746,"sku":"BWCS-TTV100SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306863591514,"sku":"BWCS-TTV100SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TTV100SL_1.webp?v=1777768792","url":"https:\/\/batteryweb.com\/products\/tristartester-smp-tt2-replacement-battery-37v-400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}