{"product_id":"wolf-garten-li-ion-power-gtb-815-trimmer-replacement-battery-18v-2000mah-li-ion","title":"Wolf Garten Li-ion Power Pack 3 18V Trimmer Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWolf Garten Li-ion Power GTB 815 Trimmer — 18V Li-ion Replacement Battery (Li-ion Power Pack 3)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V, 2000mAh (36Wh) lithium-ion replacement battery for the Wolf Garten Li-ion Power GTB 815 cordless string trimmer. It replaces OEM part numbers Li-ion Power Pack 3 and 7420072. It also fits the Power HSA and GT815 platforms running the same 18V rail.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGTB 815 \/ GT815 \/ Power HSA platform fit:\u003c\/strong\u003e\n    These models share the same 18V battery rail, connector format, and BMS handshake protocol. One battery pack crosses all three without adapter changes or firmware mismatches.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack on the GTB 815 motor under repeated start-stop cycles. The BMS handled trigger-pull inrush current without tripping and held stable voltage through full cutting passes on dense grass.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use motor profiling:\u003c\/strong\u003e\n    On first use, run the trimmer at half throttle for two full cycles before tackling thick overgrowth. This lets the BMS record the motor's inrush current signature and set overcurrent thresholds accurately before you push maximum load.\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 GTB 815 trigger pull\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GTB 815 motor pulls a sharp current spike the instant the trigger engages. If the BMS hasn't profiled that inrush yet — common with a new or fully rested pack — it can read the spike as a fault and cut output immediately. This is a protection response, not a defective battery. Run two half-load cycles first to let the BMS calibrate its overcurrent window to the motor's actual start profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger not recognising pack after storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that sit unused for several months can drop below the voltage threshold the charger uses to confirm a valid pack — typically around 2.5V per cell. When cell voltage falls under that floor, the charger refuses to begin a charge cycle and may blink an error. To recover the pack, place it in the charger and hold it there for 10–15 minutes; many chargers apply a low-current trickle to bring cells back above the 2.5V acceptance threshold before switching to normal charge mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416035819610,"sku":"BWCS-WGT815PW-1","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416035852378,"sku":"BWCS-WGT815PW-2","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416035885146,"sku":"BWCS-WGT815PW-3","price":103.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WGT815PW-1.webp?v=1779759628","url":"https:\/\/batteryweb.com\/products\/wolf-garten-li-ion-power-gtb-815-trimmer-replacement-battery-18v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}