A few years ago the spanish builder BH was one of the first to use inner batteries.
Bosch jumped on this train with 500wh batteries in 2017.
Reention makes inner cases that can fit 65 cells (2017).
13S6P brakes the 1kwh limit with 3500mAh cells – 48V20.4Ah with 3400 mAh cells.
Why not make bigger cases, there is place inside the triangle of most bikes for bigger inner cases, this mount is solid enough to support more weight. 13S8P (LGMj1) would be around 8kg, over 1300wh, with an “almost normal / standard” frame.
Download pdf : 2017 Reention Catalogue, 2017 Shanshan CatalogueQuality components / configuration for Europe market:
1# Inner case with 13S6P: 3200mAh-48V19.2Ah, 3500mAh-48V21Ah, 4A charger
2# 48V Bafang middrive 500/750W, speed pedalec – top speed over 45km/h
3# 42-44T chain ring, shift sensor, full throttle, color LCD DPC14 (LED for offroad)
4# 26″ / 27.5″ wheels w Maxxis Minion DHR 26×2.30 / 27.5×2.30
5# Brakes : 2 x 180mm Tektro Auriga Hydraulic Disc brakes
6# Air Suspension: ex-SR Suntour Epixon & SR Suntour Air Shock both /w Lockout
7# Gears: Shimano Acera 9 speed 11-34T / KMC X9.73 or Sram NX11 / KMC X11E
244USD + VAT is end user price in shops, in Romania, for next configuration / bicycle: