Yeah @MDB, it gets folks dander up, rechargeable v disposable, it is always going to be contentious, lots of folks love their rechargeable aids, and rightly so, if they suit your lifestyle, and their hearing loss, then they are an obvious choice… For me personally, I detest rechargeable aids in their present design, for many reasons they are inferior to the disposable battery version, one of which is their tendency to shut down in “Sub Zero” temperatures, these Li-on reachable aids have a BMS (Battery Management System) they will switch off, and not reboot until replaced in the charger, this happened to me on 2 separate occasions whilst out in the sticks, working in challenging circumstances, it is a known issue with Phonak rechargeable aids, in fact, Phonak replaced the M90 rechargeable aids, with M90 disposable p13’s, even though I was outside the 60 day trial period, with no quibble whatsoever… Which tells me, they know all about this issue… In truth, a M90 p13 with 105db RIC’s doesn’t quite cut it any more with my loss, and as far as I am aware, a rechargeable UP or SP aids from Phonak has yet to be developed, or indeed any of the other top 6 manufacturers? So the Naida UP with 675 batteries, is the only obvious weapon of choice, at present… I suffer from severe anxiety, a legacy from 2 bouts of Sepsis, which caused PTSD, or sometimes called Sepsis Syndrome, and perhaps the last thing I need is any range anxiety with hearing aids… Cheers Kev