Ultimate Ears MEGABOOM Bluetooth Speaker

UPDATE AS 27/03/2020: It doesn’t charge no more. Waste of money, 2 out of 5 speakers work no more. I WANT A REFUND! The 1st one I get it from a BestBuy, brand new. Zero problems, besides the battery life after 4 months (two-three hours per week) of use is at 80% at its best compared to those days when new. For me, this is a quick reduction of battery life...maybe Im wrong and being to judgmental after the sad experiences of the other units purchased. Then I decided to give a shot to the "renewed" version because of the price and the fact I had then doubts about the battery life. This ones was ordered also in black charcoal color to match the 1st one. That was like 1 month a go to pair it with the first one trough Megaboom App to have a "stereo" mode and it was awesome!, then ....mixed emotions. That first "renewed" one came with one of the outter plastic layer kind of unglued, since its a refurbished item I didn't pay that much attention while being in love with the sound quality of the pair of speakers linked to stereo mode. Due to the sound good experience (Good mid, clear voices, treble...nice bass not yet rich-deep but pretty decent mostly because doesn't distort at high volume) So I decided to purchase two more and use them 4 at at time expecting to enjoy them in low to mid volume in stereo mode, a week ago and prior to their arrival I had ordered a 5th one as a gift to a friend. Boomer. The third one came really dirty, worn plastic no matter what its the only one the "QC PASS" sticker I assume refers "Quality Control". After a week of use, the main plastic layer is clearly apart. Not to mention I have zero trust in the "waterproof feature". The Blue one came in better acceptable shape. The last Charcoal came as a survivor of a child mess experimenting with glue. Finger prints and something like grease was present, something not good to see. The last one also in blue color was also clean but...the battery life its lower than the older one compared to all of the rest while fully charged no matter what is the newest one. So, not happy. And finally, I supposed this is a feature I surely get know if a better research was done but now I got them meet that yes, you can set up 5 or more (I understand you can broadcast to 150 at once) but just two of them in stereo mode. So my purpose of having 4 in stereo mode wasn't achieved. Sad.