You can get any capacity you want, but be aware that there are two different Hailong cases that look the same, but are completely different in all respects, so you might find that you have to remove your old receiver and put in a new rivnut or two to line up with the new fixing points.
It's a shame you didn't look at the forum last week. Yosepower did a flash sale of 48v 12Ah Hailong batteries for £155 delivered. A few of us got one or more. It's now back up to around £200, still not a bad price as long as your motor isn't too powerful, as it's 20A max.
Original Cell 36V15.6Ah/48V12.5Ah Down Tube Battery Lithium-ion Battery Electric Bicycle Bottle New Black DIY (not same as 36V Hailong battery) 1.Technical DataVoltage: 36V / 48VCapacity: 15.6Ah / 12.5AhEnergy: 577Wh / 601WhWeight(with holder): ca. 4.0kg / 4.2kgCell: High Power 18650Cycle...
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