{"product_id":"bostitch-gbt1850k-replacement-battery-36v-1500mah-li-ion","title":"Bostitch GBT1850K 3.6V Replacement Battery 9B12070R","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBostitch GBT1850K Series — 3.6V Li-ion Replacement Battery (9B12070R)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1500mAh Li-ion replacement battery for Bostitch cordless tools carrying part number 9B12070R. It fits the GBT1850K, GF1564K, GFN1564K, and GFN1664K models. Capacity is 5.4Wh — matching the original specification from Bostitch.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGBT1850K and GFN series compatibility:\u003c\/strong\u003e\n    These models share the same 3.6V voltage rail, connector footprint, and BMS handshake protocol. A single cell configuration at this voltage means any mismatch in BMS communication will prevent the tool from drawing current — the pack listed here is mapped to the correct handshake for all four models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack under load on the GBT1850K platform and logged the BMS response across trigger-pull inrush events. The overcurrent threshold did not trip during normal actuation, and the BMS correctly reported state-of-charge back to the tool controller.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush break-in on first use:\u003c\/strong\u003e\n    Run the tool at partial load for the first two cycles before full-torque applications. This allows the BMS to profile the motor's inrush current signature and calibrate overcurrent thresholds before high-demand tasks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS overcurrent trip on trigger-pull inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt 3.6V with a single-cell Li-ion pack, the BMS overcurrent threshold sits close to the motor's start-up inrush spike. If the pack has been sitting in storage, cell voltage can drop low enough that the BMS interprets the inrush current as a fault condition and trips the protection circuit before the motor fully engages. This is not a defective battery — it is the BMS reacting to a voltage-starved cell. Charge the pack to full before the first use to bring cell voltage above 3.9V and reset the protection threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red and refusing to accept a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eBostitch chargers for this voltage class apply a trickle-charge gate — if the incoming cell voltage reads below approximately 3.0V, the charger rejects the pack and signals a fault with a blinking red LED. This happens on new-from-box or long-stored batteries that have self-discharged past the charger's acceptance window. Place the pack on the charger for 10–15 minutes and remove it twice in succession — some chargers will attempt a recovery pulse on the second insertion. If cell voltage is confirmed above 3.0V with a multimeter and the charger still blinks red, check the terminal contacts for oxidation and clean with isopropyl alcohol before reinserting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416073961562,"sku":"BWCS-HTB315PW-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416073994330,"sku":"BWCS-HTB315PW-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416074027098,"sku":"BWCS-HTB315PW-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTB315PW-1.webp?v=1779760117","url":"https:\/\/batteryweb.com\/products\/bostitch-gbt1850k-replacement-battery-36v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}