Join Date: Dec 2008
Thanked 18 Times in 17 Posts
Rep Power: 8
The battery technology does not differ for a single or parallel 3 batteries. The porblem is there is a slim opportunity to find a failing one. If onefails andyoucan pinpoint it in the beginning you can easilychange it.
But in practice it is not possible to find the failure before the others get defective as well. It will be always a good idea to change all three, because if one faails, it is more likely the otherswill fail due to the defective one.
Another alternative is to use three batteries separately. You can swith to the second or third battery if the first is discharged.