Have a work inspecting, reviewing the pack situation is worth it
meant if there's possibility an extra space in all dimension
we'd try transform it to 'normal way' ie. replace them with the bumped (+) pole ones, give them the on-market-available houses and charging them with their special quality charger
by this all drawbacks of resistance-welded pack get avoided, mainly dissimilarity temperature surrounding batteries
the ones in the inner position always get hotter hence degraded more quickly .
temperatures above 60°C gives Li-ion battery loses capacity linearly, in turn its performance
it's must be within 10°C to +55°C.temperature range, but when charging take place must be ~ +5° - +41°C.
preventing from going down to nominal V is not hard to do manually as the using tool performance should be a telltale
whenever it shows noticeable down performance quickly pull out and put into charger one by one,
could google better than me ones:
https://charger.nitecore.com/product/ums4IMHO this'd give the Li-ion battery far longer lifetime as they get rolled over position and evened in high temp. impact
might benefit read
https://www.plarad.de/fileadmin/downloads/FAQ_related%20to%20lithium%20ion%20rechargeable%20battery%20care_DA1_en_0216.pdf