{"product_id":"cembre-b-tc650-sc-replacement-battery-18v-6000mah-li-ion","title":"Cembre B-TC650-SC 18V Replacement Battery 6000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCembre B-TC650-SC — 18V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V 6000mAh Li-ion replacement battery for the Cembre B-TC650-SC cordless power tool platform. It fits the cutting, fastening, and drilling tools in the B-TC650-SC line. Voltage and capacity match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eB-TC650-SC platform compatibility:\u003c\/strong\u003e\n    These tools share an 18V rail with a specific BMS handshake tied to connector pinout and cell voltage signalling. This replacement matches that profile, so the tool and charger recognise the pack without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated motor-start inrush events typical of the B-TC650-SC load profile. The BMS handled the trigger-pull current spike without tripping, and cell voltage recovered cleanly between draws.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use load conditioning:\u003c\/strong\u003e\n    Run the tool at half load for two cycles before applying full torque. This lets the BMS profile the motor inrush current draw and calibrate overcurrent thresholds before you push the tool to maximum demand.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS Cutoff on Motor-Start Inrush with the B-TC650-SC\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe B-TC650-SC draws a short, sharp inrush current every time the trigger is pulled from rest. On a new or cold pack, the BMS overcurrent threshold can interpret this spike as a fault and cut the output before the motor reaches speed. This is especially common in the first few cycles or when cell temperature is below 10°C. Running the tool at reduced load for two initial cycles trains the BMS to differentiate between a normal start surge and a genuine overcurrent event.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool Bogs Under Load After Pack Feels Fully Charged\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the B-TC650-SC starts strong but loses torque partway through a cut or fastening run, the cause is usually voltage sag under sustained draw rather than low capacity. High contact resistance at the battery rail — from dust, oxidation, or a worn connector — forces the voltage to drop under load even when the pack reads full. Clean the battery contacts and tool terminals with isopropyl alcohol and check for spring tension on the tool-side connector. After cleaning, the resting voltage on a full pack should read between 20.5V and 21V on a multimeter.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416023171162,"sku":"BWCS-MTK570PX-1","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416023203930,"sku":"BWCS-MTK570PX-2","price":136.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416023236698,"sku":"BWCS-MTK570PX-3","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTK570PX-1.webp?v=1779759485","url":"https:\/\/batteryweb.com\/products\/cembre-b-tc650-sc-replacement-battery-18v-6000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}