<div dir="ltr"><div class="gmail_default" style="font-family:times new roman,serif;font-size:large">If the batteries have a 10-year life, I don't think it would make much difference. LA batteries show an increase in internal resistance after a few recharges. Typically, the BMS in a Li battery will ensure at top balance all cells balance,  If the batteries are being properly recharged.   </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 23, 2024 at 4:05 PM jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">HI All<br>
<br>
Speaking of batteries  I wonder what you all make of this.<br>
<br>
I was reading the Fortress battery manual and it says they don’t recommend adding new lithium batteries to older lithium batteries if the age is over 1 year difference.<br>
<br>
Thoughts?<br>
<br>
thanks<br>
jay<br>
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