Hi Mohammed, it is SYR intergrated battery, called SYR002 Mustang-
A, 340L, the plasitc cover length is about 340mm.
48V 14Ah is already the max option.
A type means the case has the bottom charging port, and it is also available for charging via the frame charging port, connected via the middle two pins among 4pin discharging port. (Sounds a bit complicated, pls refer the pics below.)
There is also similar B type, which has a side charging port. (e.g. Haoqi ebike uses all B types.)
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