So here we go. Before sending the device to my regional ifi certified technician to charge me around 400eur for a brand new battery which goes beyond scam, I wanna play my cards and see if this TP4056 module can miraculously revive it which btw was recommended to me by a guy in another forum...

I have the opportunity to get a very well-conserved iFi Micro iDSD on the second-hand market for around 150-200eur. Is it worth it or should I rather go for a Signature or Black Label? I plan on using it with a pair of HD650 and MSR7b. How does it perform with the latest iOS and Android software...