{"product_id":"bra-emotion-gravel-x-replacement-battery-36v-13000mah-li-ion","title":"Bra Emotion Gravel X 36V 13000mAh Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBra Emotion Gravel X — 36V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 36V 13000mAh (468Wh) lithium-ion battery is a direct replacement for the Bra Emotion Gravel X electric bike. It feeds the motor controller the sustained current needed for pedal-assist and electric-only modes across gravel and mixed-terrain routes. Swap it when the original no longer holds a charge or fails to complete a ride.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGravel X motor system compatibility:\u003c\/strong\u003e\n    The Gravel X motor controller negotiates with the battery's BMS over voltage level and draw rate. This pack matches the 36V rail and connector pinout that the Gravel X expects, so the controller communicates cleanly without throwing a fault code on startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through sustained 250W draw intervals to simulate climbing loads. The BMS held the output rail steady and tripped correctly at the low-voltage cutoff threshold — no false trips under mid-range draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst ride after winter storage:\u003c\/strong\u003e\n    After any extended storage period, charge this battery slowly at the lowest available charge rate before the first ride. Cold Li-ion cells carry higher internal resistance, and pushing full current into them below 10°C causes lithium plating on the anode that permanently reduces total cycle life.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGravel X motor cutting out mid-hill on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA sustained climb pulls continuous high current from the pack — well above the flat-road draw. If the BMS detects cell voltage dropping below its protection threshold during that peak load, it trips the output to protect the cells. This is not a fault with the pack itself. It usually means the cells are cold, the battery was not fully charged before the ride, or the rider weight plus gradient is pulling current above the BMS trip point. Charge to 100% before steep-terrain rides and keep the pack at room temperature before setting off.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger shows no activity after the Gravel X battery has been in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a Li-ion pack sits unused for several months, cell voltage can drop below the minimum acceptance threshold that most chargers require before they begin a charge cycle. The charger sees the pack voltage as too low and refuses to initiate current flow. Connect the charger and leave it undisturbed for up to 30 minutes — many chargers include a trickle pre-charge stage that will slowly bring the cells back up to acceptance voltage. If the charger light does not change state after 30 minutes, check that pack voltage at the connector reads above 30V with a multimeter before proceeding.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360278937690,"sku":"BWCS-WBS942SL-1","price":421.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360278970458,"sku":"BWCS-WBS942SL-2","price":503.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360279003226,"sku":"BWCS-WBS942SL-3","price":565.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WBS942SL-1.webp?v=1778611066","url":"https:\/\/batteryweb.com\/products\/bra-emotion-gravel-x-replacement-battery-36v-13000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}