Hi Everyone,
I recently got a 100Ah smart battery. On initial receiving the battery before i took it out of the box cell #2 and #3 were 0.3 Volt lower than the Cells #1 and #4.
This was a bigger difference than i expected on a brand new premium battery but I figured it was within tolerance.
I've ran the battery on a very slow charge and got all cells balanced to within 0.01 V.
I've used the battery a for one small discharge test of maybe 15 or 20% taken out of the batteries.
let the charger recharge back up to 100% and it was balanced within 0.1V across all cells after the charger went into float.
I've now left the battery and charger in float for 2 days and I'm back to a cell voltage difference of 0.05 V in just 2 days with no load on the battery at all.
0.05 V in-balance in 2 days with no load looks very poor.
This worries me. it looks like i might have a couple of bad cells.
Any thoughts?