groot59
New Member
I have generally had pretty good success buying batteries and cells through AliExpress, but this last one is a headscratcher....
I purchased a 24V 300Ahr LiFePO4, and on receipt it felt really light and battery box (which was appropriate size) was significantly imbalanced (felt empty on one end). The measured weight is 12kg. I did a quick undocumented drawn down test on it and the measured capacity is about 50Ahr.
My contention is that this battery should contain 8 300A-hr cells each weighing 5.5kg, so this battery should weigh at least 44kg + case and BMS (The weight is close to expected for a 50Ahr battery)
AliExpress is rejecting my dispute based on weight and doesn't like my draw-down test methodology (Using my Victron system data logging).
Any thoughts on how to best provide evidence that this battery does not meet the stated capacity.
Will, any interest in doing a tear-down? Link is below.
https://www.aliexpress.us/item/3256....0.0.6c8238dacJoJkt&mp=1&gatewayAdapt=glo2usa
John G
I purchased a 24V 300Ahr LiFePO4, and on receipt it felt really light and battery box (which was appropriate size) was significantly imbalanced (felt empty on one end). The measured weight is 12kg. I did a quick undocumented drawn down test on it and the measured capacity is about 50Ahr.
My contention is that this battery should contain 8 300A-hr cells each weighing 5.5kg, so this battery should weigh at least 44kg + case and BMS (The weight is close to expected for a 50Ahr battery)
AliExpress is rejecting my dispute based on weight and doesn't like my draw-down test methodology (Using my Victron system data logging).
Any thoughts on how to best provide evidence that this battery does not meet the stated capacity.
Will, any interest in doing a tear-down? Link is below.
https://www.aliexpress.us/item/3256....0.0.6c8238dacJoJkt&mp=1&gatewayAdapt=glo2usa
John G