good battery just a tad too loud
347164
I use these for listening to TV at night.  The lowest volume is a bit too high so I have to wear them off my ears which pinches the tops of my ears.  The battery lasts a long time.  It lasts all night the first night until just before I am ready to get up the second night.  They charge very quickl, and can be used on the cord if your battery runs out.  The sound quality is good, just a tad too loud for me.
1495336
I really like the device, it has bluetooth range a little better than my bluetooth headset.
Its battery supports right about 8 hours of use for me, which is enough for work - but not enough for the bus ride home if I forget to charge it during lunch.

My only major complaint is that it goes into power-save mode when I'm in a phone call on my iPhone 4s, so I have to use my cheap-o headset for calls where I mute myself for more than a few minutes (ie: basically all conference calls).

Despite the small battery and phone-call issue, I'd still buy it again.
4295670
I'd give it a 3.5 if I could. The battery is great, I usually get 3 days from 100% battery. Unfortunately the case design masks 60% of the speakers volume...
3736456
Had a bad battery in first one. CS was easy to deal with and made sure I got a fully working one and gave me extra time to evaluate and return for refund if I didn't want it.

It can be turned up VERY loud if you want. I started at max volume figuring that's where I'd want it and as soon as it started ringing it was hurrying to turn it down. It was VERY loud.

I also like the 2 modes. You can pick if you want all sounds or just ringing through this thing.
3770772
This battery works pretty good but my phone had another issue with the motherboard so I didn't get to enjoy the battery. I had to purchase a new phone but hopefully I can get this one fixed so I can have a backup.
754776
Shipping was great and very fast. The outer case doesn't fit all that snugly, it seems to be oddly warped a little on the edge side, I think because of the way it was stuffed in the shipping box. But it will do.

The battery life I am getting doesn't seem that much different (better) compared what I was getting with my old original battery, though. I think my expectations were too high.

It's a good replacement, doesn't get too hot when overusing but it will get hot in the car if I'm streaming and don't have a strong signal. I just unplug it and it cools down quickly.

It's worth the price but don't expect to suddenly get a full day of life out of your device. I use it heavily at the gym at around 5am and I am down to 70% by 9 am. With the old battery, I was down to about 60% by 9 am.

I honestly don't think this battery is the problem, the problem lies with the phone manufacturer.

The phone itself has reached the end of its life. This battery is basically the best life support available.
4471817
Good Charger but Annoying ringing sound when its on for an extended amount of time.
4567364
It could be a tad louder. When you're on a crowded beach, it doesn't get loud enough to hear. Other than that, the sound quality is good. The battery outlasts my phone battery.
522634
I like it and my dog tolerates it pretty well. The only problem is - it's too loud. The noise scared her at first, but now she's getting used to it. The nail trimmer I had before was much quieter.
1048203
I like the battery and how portable but not super loud sound. I wanted to use for cheer practices but it does not produce enough sound.
4705197
I had a prior one from this company. This is really loud when it goes off. Be careful where you place it though as when it goes off, due to the battery dying...well it can be a little shocking which is what it's for but I wish the battery alarm wasn't quite as loud.  My alarms are hard wired as well as battery powered so the battery is over kill. You think it would just beep but the alarm went off to alert me the battery needed replacement.  The prior one just beeped.
1977304
I didn't know my iphone could NOT charge wirelessly to this battery, but even then I like it because I can charge my phone 4 times which is helpful since sometimes I forget to charge my spare battery, which probably goes with forgetting to charge the phone. I just do not like how it has a loud beep sound when you press the power button; it's kind of embarrassing in class.
4398280
I like that its small. I wish it could keep a charge longer and that it could be louder.
1041162
Battery so far is doing what's it's suppose to. I drive a lot for work and while using GPS for the whole day plus talk and Web it lasted all day my only concern is that my speaker is shot. It's difficult hearing phone calls and alarm clock. The battery covers the speaker and although they added insitions at the bottom the sound is very faint. If this could be fixed it would be perfect
2219852
Works well, battery life is okay, it is a little  loud.  Can do lug nuts on my 1 ton truck, but will use up most of the battery to do four wheels.
1571866
Not as loud as they said it would be. the battery does hold great charge though
1364688
It makes a good backup battery but discharges quick because it's charging the phone and running the phone even with it being 3200mAh. I ended up getting something else and gave it to a friend.