15ah LiFeP04 higher volume than 25ah LiFeP04 ??

[Boodyhole]

My 15ah sun-ebike battery came in the other day, and it's massive... decided to see how much bigger the sun-ebike 25ah is... According to the dimensions given on each product's ebay page, the 48v 15ah(13.5x15.5x26cm) battery is 935 cubic centimeters LARGER than the 48v 25ah (26.5*10*17CM).

Any thoughts on what's going on?

(Also, while I'm here, is there something special I need to do with a new battery? I thought I read that before, but I'm not having luck finding the info again.)

 

[Pinesal]

It's possible the 25ah battery is made up of difference cells with higher capacity so you need fewer of each cell to make a pack.

For a new battery, look up "how to break in a lithium battery"

 

[Boodyhole]

That's the only thing I could think of... Kind of disappointed because I was originally planning on buying the 25ah, but dreading fitting it. The prices jumped by $100+ by the time I was ready to buy, so I decided to just downgrade it for now, and enjoy the fact that the battery would be easier to install. Ugh. My fault for not explicitly checking I guess.

Thanks!

 

[999zip999]

How about some links ?

 

[kneedeep]

Internal BMS maybe. Very interested in pictures or link also.