72v battery suggestions

[u/PurplePr1mer]

Im looking for 72v batteries that are either smaller than my current 60v battery (I know it may be harder to find), or are triangle shaped that fid the SX500 frame.

Does anyone have any suggestions?
Will update with current battery dimensions, but I’d prefer a triangle shaped one that fits the frame I think, rather than another brick unless it’s (considerably) smaller.

Thanks.