I am so sorry for my overdue response here.
As a factory, we must have to improve production efficiency. That is why we have to work with some ebike brands and battery resellers.
Therefore, I might not repond to each of your inquiry in time and might not follow your order efficiently.
But I will keep sharing some new models of ebike battery and I am happy to receive your inquiry of some specific customized battery.
Dorado 21700 505L/18inch 48V 25AH 1200WH for Ebike with <=1000W rated motor
1) 18inch Battery Length
2) 13S5P Samsung 50E 21700 Cells Pack
3) 2pin Discharge Port (6pin is optional customized)
4) DC2.1 Charging Port (Reention 3pin is optional customized)
5) 30Amp BMS for 1000W rated 1500W peak motor
6) With USB Port
As long as your current Dorado battery is about 18inch/460mm long, Dorado 25Ah is available for upgrade.
For here the most popular Dorado 48V 25Ah, hope North America riders can check stock or pre-order with them:
https://thebigknifestore.com/ @TheBigKnifeStore from Cuyahoga falls, OH, 44223
https://www.ultraebikes.com/ from Las Vegas, NV, 89123
https://www.mikese-bikes.com/ from Naperville, IL 60540
http://electricpetesbikes.com/ from Seville, OH. 44273
https://hilleater.ca/ from Salt Spring Island,BC, V8K 1N4
https://zenebikes.com/ @Ravi Kempaiah from Halifax, NS, B3M 4W4
For frame-mounted Polly battery, just as
@tomjasz mentioned, california ebike has 30pcs of 48V 17.5Ah, 52V 17.5Ah and 48V 24.5Ah in stock:
https://california-ebike.com/ from San Jose, CA 95113
Will keep updating the reseller list and hope more of you to become our partner.
Sincerely appreciate all your kind support.
Jenny