{"product_id":"xiaomi-electric-scooter-4-ultra-replacement-battery-468v-12750mah-li-ion","title":"Xiaomi P2301-BD5A Replacement Battery 46.8V 12750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Electric Scooter 4 Ultra — 46.8V Li-ion Replacement Battery (P2301-BD5A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 46.8V, 12750mAh (596.7Wh) Li-ion battery replacing OEM part P2301-BD5A. It fits the Xiaomi Electric Scooter 4 Ultra (P2301) and the Pro and Pro 2 Electric Scooter models. Same voltage rail, same connector, same BMS communication protocol as the factory pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4 Ultra, Pro, and Pro 2 compatibility:\u003c\/strong\u003e\n    These models share the same 46.8V battery architecture, connector pinout, and BMS handshake sequence. Swapping between them does not require firmware changes or adapter cables.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge and discharge cycles on the 4 Ultra platform. The BMS communicated correctly with the scooter controller — charge acceptance, cell balancing, and protection cutoffs all operated within spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start charging protocol:\u003c\/strong\u003e\n    After any period of storage in temperatures below 10°C, use the standard Xiaomi charger at a low state of charge rather than a fast charger. Cold Li-ion cells carry higher internal resistance, and pushing current into them before they warm up causes lithium plating on the anode that permanently cuts capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutting out during hill start on the 4 Ultra\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eHill starts pull peak current from the battery in under a second. On the 4 Ultra, this surge can hit 25–30A depending on rider weight and incline angle. If the battery is below roughly 30% state of charge, internal resistance rises enough that the voltage sag triggers the BMS over-current protection, cutting motor output instantly. The fix is straightforward: start the hill with the battery above 50% charge, and push off with your foot to reduce the initial current draw before the motor takes the full load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger shows no activity after the scooter sat unused for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs in storage self-discharge slowly. If cell voltage drops below approximately 2.5V per cell, the BMS enters a deep-discharge lockout state and the charger's LED shows nothing — no charge accepted, no response. To recover the pack, leave the charger connected for 20–30 minutes without interruption. Most BMS units on this platform will re-initialise once the trickle circuit pushes cells back above the acceptance threshold, typically around 2.8V per cell, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360289063002,"sku":"BWCS-XMG200SL-1","price":213.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360289095770,"sku":"BWCS-XMG200SL-2","price":253.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360289128538,"sku":"BWCS-XMG200SL-3","price":283.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XMG200SL-1.webp?v=1778611066","url":"https:\/\/batteryweb.com\/products\/xiaomi-electric-scooter-4-ultra-replacement-battery-468v-12750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}