Nuron battery issues

have bought many Hilti equipment over the years, always a great product and service, Nuron batteries are failing i lost 5 out of eight in the last 4 years, at a $100 minimum for a small battery, i have some that were nearly $300. Any updates to correct the issues with these batteries, And no you guys are aware of this, I have discussed this with you guys 2 years ago when they started failing. I keep these batteries in a climate controlled shop since I'm semi retired I thought I would buy the best system out there "Hilti". the tools are great hardly no issues, except the batteries. I have other old battery lithium's that are old, been mistreated and still work. These Hilti tools have been babied in comparison, sincerely yours, DISSAPOINTED.