BMSbattery do similar looking bottle batteries but add aprox £40 import duty to the delivered price.
Great. Just checkied to see if they were any larger than the usual bottle batteries, and found the following:
New design bottle ebike panasonic NCR18650PF battery pack 36V11.6Ah Specification:
1. Normal voltage: 36V.
2. Couninuous discharge current: 10A
3. Charge current: 2.5A.
4. 4P10S Li-ion 2.9Ah Panasonic NCR18650PF 18650
cells.
5. Size: 325mm X 90mm
EMC-120 Lithium Ion Alloy Shell
Charger Specification:
1. AC Input Voltage: 90V~132V or 200V~264V.
2. Charge Voltage: 42Volts.
3. Charge Current: 2.5Amps.
4. AC Plug: Europen Standard or American Standard.
5. Power: 120Watts.
The most advantage of this battery pack is that you can take out the battery pack from right side, not from top and there is an output for ipad and cellphone charging.
end quote/
In otherwords this new design, where to battery enters from the side, would allow enough clearance on the frame for a slightly larger bottle design.