Battery size variance for given AH rating

[mossboss]

I recently purchased a battery from dhgate that was advertised as 48v and 15 amp hour bottle battery (full specs below). Upon delivery I was quite surprised to find that it was half the length of another bottle battery I have on hand, rated 48v and 14.5 amp hours. I know little about batteries, but it seems unlikely to me that a battery with half the volume could have similar capacity to the battery I had on hand. Is this a common scam or would someone have an alternate explanation?

Nominal Tension: 48 V
Nominal Capacity: 15Ah
Cells: Li ion 18650 3.7 V power cells
BMS: 25 Amp continuous 60 ± 10Amp maximum
Motor Adjustment: 48V 500 W 750W 1000W
Charge current: 2-5A
Load cut voltage: 54.6V
Discharge cutting voltage: 39.4V
Discharge temperature: -20 to 65 ° C
Charge Temperature: 0 to 45 ° C
Dimensions: 410*100*100mm
Battery weight: 6 kg
Life Cycle: 80% capacity for 1000 cycles

 

[Hillhater]

That battery size and weight seem correct for its capacity.
But how big was the other battery ?? ..800mm long ?

 

[john61ct]

Not to say the market isn't rife with scammers

but chemistries vary greatly in energy density too.

A proper Ah capacity test will show the truth