{"product_id":"spectra-precision-pr-655-replacement-battery-37v-3300mah-li-ion","title":"Spectra Precision PR-655 Replacement Battery LHJBT-L11 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSpectra Precision PR-655 \/ PR-680 Series — 3.7V Li-ion Replacement Battery (LHJBT-L11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3300mAh Li-ion battery replaces the LHJBT-L11 pack in the Spectra Precision PR-655, PR-670, PR-680, and PR-680L rotary laser levels. These instruments are used in construction grading and surveying where the laser must stay live through long site shifts. Swap a flat pack mid-day and the PR-655 is back transmitting its reference plane within minutes of a restart.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePR-655 \/ PR-670 \/ PR-680 platform fit:\u003c\/strong\u003e\n    All four confirmed models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one pack covers the entire series without any 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 PR-680's initialisation sequence, confirmed the BMS completed charge acceptance, and verified the instrument displayed accurate state-of-charge across three full discharge cycles without a low-battery false trigger.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration step:\u003c\/strong\u003e\n    After fitting this pack, run a full self-levelling calibration cycle through the instrument menu before deploying on site. The PR-655 maps battery state during that sequence — skip it and the indicator can fire premature low-battery warnings on the first session.\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 PR-655 powers its laser diode and levelling motors simultaneously\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAt startup the PR-655 spins up its self-levelling motor and activates the laser diode in the same boot window. That combined inrush can pull a short current spike well above steady-state draw. A worn or partially discharged cell drops voltage under that spike, and the BMS reads it as an unsafe condition and cuts output. This pack's cells maintain tighter voltage under load, keeping the startup spike within the BMS threshold. If the instrument still cuts out at boot, charge to full before the next attempt — the spike tolerance is narrowest below 3.5V per cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack will not charge after the instrument sat unused in a carry case for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells left unused will self-discharge below the BMS recovery threshold — typically around 2.5V per cell — and the protection circuit locks the pack out entirely to prevent damage. The charger sees no response and shows no charging indicator. To recover, place the pack on the OEM charger and leave it connected for at least 30 minutes even with no charge light showing — most chargers apply a trickle pre-charge below 2.8V that slowly brings the cell voltage up to where the BMS re-enables normal charging. If the pack does not respond after 45 minutes on the charger, the cells have likely dropped below the recoverable floor and the pack needs replacing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360742801498,"sku":"BWCS-SPR680SL-1","price":102.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360742834266,"sku":"BWCS-SPR680SL-2","price":121.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360742867034,"sku":"BWCS-SPR680SL-3","price":135.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPR680SL-1.webp?v=1778616277","url":"https:\/\/batteryweb.com\/products\/spectra-precision-pr-655-replacement-battery-37v-3300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}